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[Experiment] Build the standard library with -Csymbol-mangling-version=v0 #142257

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@wesleywiser wesleywiser commented Jun 9, 2025

r? ghost

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) labels Jun 9, 2025
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@bors2 try @rust-timer queue

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rust-bors bot commented Jun 9, 2025

⌛ Trying commit a285550 with merge 1d83913...

To cancel the try build, run the command @bors2 try cancel.

rust-bors bot added a commit that referenced this pull request Jun 9, 2025 
[Experiment] Build the standard library with -Csymbol-mangling-version=v0
r? ghost
@rustbot rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jun 9, 2025
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rust-bors bot commented Jun 9, 2025

☀️ Try build successful (CI)
Build commit: 1d83913 (1d83913d862ee5f5e22674ff290231f3537b6d80)

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Finished benchmarking commit (1d83913): comparison URL.

Overall result: ❌ regressions - please read the text below

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

Next Steps: If you can justify the regressions found in this try perf run, please do so in sufficient writing along with @rustbot label: +perf-regression-triaged. If not, please fix the regressions and do another perf run. If its results are neutral or positive, the label will be automatically removed.

@bors rollup=never
@rustbot label: -S-waiting-on-perf +perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

mean range count
Regressions ❌
(primary)		 1.2% [1.1%, 1.3%] 4
Regressions ❌
(secondary)		 0.9% [0.5%, 1.2%] 15
Improvements ✅
(primary)		 - - 0
Improvements ✅
(secondary)		 -0.4% [-0.4%, -0.4%] 1
All ❌✅ (primary) 1.2% [1.1%, 1.3%] 4

Max RSS (memory usage)

This benchmark run did not return any relevant results for this metric.

Cycles

This benchmark run did not return any relevant results for this metric.

Binary size

Results (primary 1.3%, secondary 5.3%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 2.9% [0.4%, 10.2%] 35
Regressions ❌
(secondary)		 6.6% [2.0%, 10.2%] 82
Improvements ✅
(primary)		 -0.0% [-0.1%, -0.0%] 44
Improvements ✅
(secondary)		 -0.0% [-0.0%, -0.0%] 19
All ❌✅ (primary) 1.3% [-0.1%, 10.2%] 79

Bootstrap: 754.885s -> 753.116s (-0.23%)
Artifact size: 372.30 MiB -> 372.74 MiB (0.12%)

@rustbot rustbot added perf-regression Performance regression. and removed S-waiting-on-perf Status: Waiting on a perf run to be completed. labels Jun 10, 2025
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@bors2 try @rust-timer queue

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rust-bors bot added a commit that referenced this pull request Jun 10, 2025 
[Experiment] Build the standard library with -Csymbol-mangling-version=v0
r? ghost
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rust-bors bot commented Jun 10, 2025

⌛ Trying commit b3b1c67 with merge fd86cbb...

To cancel the try build, run the command @bors2 try cancel.

@rustbot rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jun 10, 2025
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The job aarch64-gnu-llvm-19-1 failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot) 
---- [ui] tests/ui/dyn-star/box.rs#current stdout ----
error in revision `current`: test compilation failed although it shouldn't!
status: exit status: 101
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/dyn-star/box.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "current" "--check-cfg" "cfg(test,FALSE,current,next)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/box.current/a" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers" "-C" "opt-level=0"
stdout: none
--- stderr -------------------------------
thread 'rustc' panicked at compiler/rustc_symbol_mangling/src/lib.rs:317:5:
compute_symbol_name: `_RNSNvYD*NtNtCs6z5DOJfU7oQ_4core3fmt7DisplayEL_B6_3fmt5reifyCskA3p4kQ8llX_3box` cannot be demangled
stack backtrace:
 0: __rustc::rust_begin_unwind
 1: core::panicking::panic_fmt
 2: rustc_symbol_mangling::symbol_name_provider
 [... omitted 3 frames ...]
 3: <rustc_middle::mir::mono::MonoItem>::symbol_name
 4: <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)>>::extend_trusted<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>::{closure#0}>::{closure#0}>
 5: <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)> as alloc::vec::spec_from_iter::SpecFromIter<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>>::from_iter
 6: rustc_monomorphize::partitioning::assert_symbols_are_distinct::<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>
 7: <rustc_session::session::Session>::time::<(&[rustc_middle::mir::mono::CodegenUnit], ()), rustc_monomorphize::partitioning::collect_and_partition_mono_items::{closure#0}>
 8: rustc_monomorphize::partitioning::collect_and_partition_mono_items
 [... omitted 3 frames ...]
 9: rustc_codegen_ssa::base::codegen_crate::<rustc_codegen_llvm::LlvmCodegenBackend>
 10: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
 11: rustc_interface::passes::start_codegen
 12: <rustc_interface::queries::Linker>::codegen_and_build_linker
 13: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
 14: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
 15: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
 16: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
 17: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
 18: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
 19: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
---
note: please make sure that you have updated to the latest nightly
note: rustc 1.89.0-nightly (e8a443daf 2025年06月10日) running on aarch64-unknown-linux-gnu
note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0 -C opt-level=0
query stack during panic:
#0 [symbol_name] computing the symbol for `<dyn* core::fmt::Display as core::fmt::Display>::fmt - shim(reify)`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
------------------------------------------
---- [ui] tests/ui/dyn-star/box.rs#next stdout ----
error in revision `next`: test compilation failed although it shouldn't!
status: exit status: 101
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/dyn-star/box.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "next" "--check-cfg" "cfg(test,FALSE,current,next)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/box.next/a" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers" "-Znext-solver" "-C" "opt-level=0"
stdout: none
--- stderr -------------------------------
thread 'rustc' panicked at compiler/rustc_symbol_mangling/src/lib.rs:317:5:
compute_symbol_name: `_RNSNvYD*NtNtCs6z5DOJfU7oQ_4core3fmt7DisplayEL_B6_3fmt5reifyCskA3p4kQ8llX_3box` cannot be demangled
stack backtrace:
 0: __rustc::rust_begin_unwind
 1: core::panicking::panic_fmt
 2: rustc_symbol_mangling::symbol_name_provider
 [... omitted 3 frames ...]
 3: <rustc_middle::mir::mono::MonoItem>::symbol_name
 4: <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)>>::extend_trusted<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>::{closure#0}>::{closure#0}>
 5: <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)> as alloc::vec::spec_from_iter::SpecFromIter<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>>::from_iter
 6: rustc_monomorphize::partitioning::assert_symbols_are_distinct::<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>
 7: <rustc_session::session::Session>::time::<(&[rustc_middle::mir::mono::CodegenUnit], ()), rustc_monomorphize::partitioning::collect_and_partition_mono_items::{closure#0}>
 8: rustc_monomorphize::partitioning::collect_and_partition_mono_items
 [... omitted 3 frames ...]
 9: rustc_codegen_ssa::base::codegen_crate::<rustc_codegen_llvm::LlvmCodegenBackend>
 10: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
 11: rustc_interface::passes::start_codegen
 12: <rustc_interface::queries::Linker>::codegen_and_build_linker
 13: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
 14: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
 15: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
 16: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
 17: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
 18: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
 19: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
---
note: please make sure that you have updated to the latest nightly
note: rustc 1.89.0-nightly (e8a443daf 2025年06月10日) running on aarch64-unknown-linux-gnu
note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0 -Z next-solver -C opt-level=0
query stack during panic:
#0 [symbol_name] computing the symbol for `<dyn* core::fmt::Display as core::fmt::Display>::fmt - shim(reify)`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
------------------------------------------
---- [ui] tests/ui/dyn-star/cell.rs stdout ----
error: test compilation failed although it shouldn't!
status: exit status: 101
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/dyn-star/cell.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "-O" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/cell/a" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
--- stderr -------------------------------
thread 'rustc' panicked at compiler/rustc_symbol_mangling/src/lib.rs:317:5:
compute_symbol_name: `_RINvNtCs6z5DOJfU7oQ_4core3ptr13drop_in_placeD*INtCsahqIOooDzgU_4cell2RwjEEL_EBL_` cannot be demangled
stack backtrace:
 0: __rustc::rust_begin_unwind
 1: core::panicking::panic_fmt
 2: rustc_symbol_mangling::symbol_name_provider
 [... omitted 3 frames ...]
 3: <rustc_middle::mir::mono::MonoItem>::symbol_name
 4: <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)>>::extend_trusted<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>::{closure#0}>::{closure#0}>
 5: <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)> as alloc::vec::spec_from_iter::SpecFromIter<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>>::from_iter
 6: rustc_monomorphize::partitioning::assert_symbols_are_distinct::<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>
 7: <rustc_session::session::Session>::time::<(&[rustc_middle::mir::mono::CodegenUnit], ()), rustc_monomorphize::partitioning::collect_and_partition_mono_items::{closure#0}>
 8: rustc_monomorphize::partitioning::collect_and_partition_mono_items
 [... omitted 3 frames ...]
 9: rustc_codegen_ssa::base::codegen_crate::<rustc_codegen_llvm::LlvmCodegenBackend>
 10: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
 11: rustc_interface::passes::start_codegen
 12: <rustc_interface::queries::Linker>::codegen_and_build_linker
 13: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
 14: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
 15: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
 16: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
 17: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
 18: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
 19: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
---
note: please make sure that you have updated to the latest nightly
note: rustc 1.89.0-nightly (e8a443daf 2025年06月10日) running on aarch64-unknown-linux-gnu
note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0
query stack during panic:
#0 [symbol_name] computing the symbol for `core::ptr::drop_in_place::<dyn* Rw<usize>> - shim(Some(dyn* Rw<usize>))`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
------------------------------------------
---- [ui] tests/ui/dyn-star/const.rs stdout ----
error: test compilation failed although it shouldn't!
status: exit status: 101
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/dyn-star/const.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "-O" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/const/a" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
--- stderr -------------------------------
thread 'rustc' panicked at compiler/rustc_symbol_mangling/src/lib.rs:317:5:
compute_symbol_name: `_RINvNtCs6z5DOJfU7oQ_4core3ptr13drop_in_placeD*NtNtB4_3fmt5DebugEL_ECsgqINSOlOajq_5const` cannot be demangled
stack backtrace:
 0: __rustc::rust_begin_unwind
 1: core::panicking::panic_fmt
 2: rustc_symbol_mangling::symbol_name_provider
 [... omitted 3 frames ...]
 3: <rustc_middle::mir::mono::MonoItem>::symbol_name
 4: <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)>>::extend_trusted<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>::{closure#0}>::{closure#0}>
 5: <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)> as alloc::vec::spec_from_iter::SpecFromIter<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>>::from_iter
 6: rustc_monomorphize::partitioning::assert_symbols_are_distinct::<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>
 7: <rustc_session::session::Session>::time::<(&[rustc_middle::mir::mono::CodegenUnit], ()), rustc_monomorphize::partitioning::collect_and_partition_mono_items::{closure#0}>
 8: rustc_monomorphize::partitioning::collect_and_partition_mono_items
 [... omitted 3 frames ...]
 9: rustc_codegen_ssa::base::codegen_crate::<rustc_codegen_llvm::LlvmCodegenBackend>
 10: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
 11: rustc_interface::passes::start_codegen
 12: <rustc_interface::queries::Linker>::codegen_and_build_linker
 13: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
 14: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
 15: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
 16: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
 17: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
 18: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
 19: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
---
note: please make sure that you have updated to the latest nightly
note: rustc 1.89.0-nightly (e8a443daf 2025年06月10日) running on aarch64-unknown-linux-gnu
note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0
query stack during panic:
#0 [symbol_name] computing the symbol for `core::ptr::drop_in_place::<dyn* core::fmt::Debug> - shim(Some(dyn* core::fmt::Debug))`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
------------------------------------------
---- [ui] tests/ui/dyn-star/dont-unsize-coerce-dyn-star.rs stdout ----
error: test compilation failed although it shouldn't!
status: exit status: 101
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/dyn-star/dont-unsize-coerce-dyn-star.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "-O" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/dont-unsize-coerce-dyn-star/a" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
--- stderr -------------------------------
warning: the feature `dyn_star` is incomplete and may not be safe to use and/or cause compiler crashes
##[warning] --> /checkout/tests/ui/dyn-star/dont-unsize-coerce-dyn-star.rs:4:12
 |
LL | #![feature(dyn_star)]
 | ^^^^^^^^
 |
 = note: see issue #102425 <https://github.com/rust-lang/rust/issues/102425> for more information
 = note: `#[warn(incomplete_features)]` on by default
thread 'rustc' panicked at compiler/rustc_symbol_mangling/src/lib.rs:317:5:
compute_symbol_name: `_RINvNtCs6z5DOJfU7oQ_4core3ptr13drop_in_placeD*NtCshrz2T9v12lj_27dont_unsize_coerce_dyn_star6AddOneEL_EBK_` cannot be demangled
stack backtrace:
 0: __rustc::rust_begin_unwind
 1: core::panicking::panic_fmt
 2: rustc_symbol_mangling::symbol_name_provider
 [... omitted 3 frames ...]
 3: <rustc_middle::mir::mono::MonoItem>::symbol_name
 4: <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)>>::extend_trusted<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>::{closure#0}>::{closure#0}>
 5: <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)> as alloc::vec::spec_from_iter::SpecFromIter<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>>::from_iter
 6: rustc_monomorphize::partitioning::assert_symbols_are_distinct::<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>
 7: <rustc_session::session::Session>::time::<(&[rustc_middle::mir::mono::CodegenUnit], ()), rustc_monomorphize::partitioning::collect_and_partition_mono_items::{closure#0}>
 8: rustc_monomorphize::partitioning::collect_and_partition_mono_items
 [... omitted 3 frames ...]
 9: rustc_codegen_ssa::base::codegen_crate::<rustc_codegen_llvm::LlvmCodegenBackend>
 10: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
 11: rustc_interface::passes::start_codegen
 12: <rustc_interface::queries::Linker>::codegen_and_build_linker
 13: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
 14: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
 15: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
 16: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
 17: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
 18: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
 19: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
---
note: please make sure that you have updated to the latest nightly
note: rustc 1.89.0-nightly (e8a443daf 2025年06月10日) running on aarch64-unknown-linux-gnu
note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0
query stack during panic:
#0 [symbol_name] computing the symbol for `core::ptr::drop_in_place::<dyn* AddOne> - shim(Some(dyn* AddOne))`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
warning: 1 warning emitted
------------------------------------------
---- [ui] tests/ui/dyn-star/dispatch-on-pin-mut.rs stdout ----
error: test compilation failed although it shouldn't!
status: exit status: 101
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/dyn-star/dispatch-on-pin-mut.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "-O" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/dispatch-on-pin-mut/a" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers" "--edition=2021"
stdout: none
--- stderr -------------------------------
warning: the feature `dyn_star` is incomplete and may not be safe to use and/or cause compiler crashes
##[warning] --> /checkout/tests/ui/dyn-star/dispatch-on-pin-mut.rs:5:12
 |
LL | #![feature(dyn_star)]
 | ^^^^^^^^
 |
 = note: see issue #102425 <https://github.com/rust-lang/rust/issues/102425> for more information
 = note: `#[warn(incomplete_features)]` on by default
thread 'rustc' panicked at compiler/rustc_symbol_mangling/src/lib.rs:317:5:
compute_symbol_name: `_RINvNtCs6z5DOJfU7oQ_4core3ptr13drop_in_placeD*NtNtNtB4_6future6future6Futurep6OutputlEL_ECsiuHUYT06xzq_19dispatch_on_pin_mut` cannot be demangled
stack backtrace:
 0: __rustc::rust_begin_unwind
 1: core::panicking::panic_fmt
 2: rustc_symbol_mangling::symbol_name_provider
 [... omitted 3 frames ...]
 3: <rustc_middle::mir::mono::MonoItem>::symbol_name
 4: <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)>>::extend_trusted<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>::{closure#0}>::{closure#0}>
 5: <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)> as alloc::vec::spec_from_iter::SpecFromIter<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>>::from_iter
 6: rustc_monomorphize::partitioning::assert_symbols_are_distinct::<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>
 7: <rustc_session::session::Session>::time::<(&[rustc_middle::mir::mono::CodegenUnit], ()), rustc_monomorphize::partitioning::collect_and_partition_mono_items::{closure#0}>
 8: rustc_monomorphize::partitioning::collect_and_partition_mono_items
 [... omitted 3 frames ...]
 9: rustc_codegen_ssa::base::codegen_crate::<rustc_codegen_llvm::LlvmCodegenBackend>
 10: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
 11: rustc_interface::passes::start_codegen
 12: <rustc_interface::queries::Linker>::codegen_and_build_linker
 13: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
 14: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
 15: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
 16: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
 17: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
 18: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
 19: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
---
note: please make sure that you have updated to the latest nightly
note: rustc 1.89.0-nightly (e8a443daf 2025年06月10日) running on aarch64-unknown-linux-gnu
note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0
query stack during panic:
#0 [symbol_name] computing the symbol for `core::ptr::drop_in_place::<dyn* core::future::future::Future<Output = i32>> - shim(Some(dyn* core::future::future::Future<Output = i32>))`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
warning: 1 warning emitted
------------------------------------------
---- [ui] tests/ui/dyn-star/drop.rs stdout ----
error: test compilation failed although it shouldn't!
status: exit status: 101
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/dyn-star/drop.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "-O" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/drop/a" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
--- stderr -------------------------------
thread 'rustc' panicked at compiler/rustc_symbol_mangling/src/lib.rs:317:5:
compute_symbol_name: `_RINvNtCs6z5DOJfU7oQ_4core3ptr13drop_in_placeD*NtNtB4_3fmt5DebugEL_ECs40Cl1W8Lz6x_4drop` cannot be demangled
stack backtrace:
 0: __rustc::rust_begin_unwind
 1: core::panicking::panic_fmt
 2: rustc_symbol_mangling::symbol_name_provider
 [... omitted 3 frames ...]
 3: <rustc_middle::mir::mono::MonoItem>::symbol_name
 4: <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)>>::extend_trusted<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>::{closure#0}>::{closure#0}>
 5: <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)> as alloc::vec::spec_from_iter::SpecFromIter<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>>::from_iter
 6: rustc_monomorphize::partitioning::assert_symbols_are_distinct::<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>
 7: <rustc_session::session::Session>::time::<(&[rustc_middle::mir::mono::CodegenUnit], ()), rustc_monomorphize::partitioning::collect_and_partition_mono_items::{closure#0}>
 8: rustc_monomorphize::partitioning::collect_and_partition_mono_items
 [... omitted 3 frames ...]
 9: rustc_codegen_ssa::base::codegen_crate::<rustc_codegen_llvm::LlvmCodegenBackend>
 10: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
 11: rustc_interface::passes::start_codegen
 12: <rustc_interface::queries::Linker>::codegen_and_build_linker
 13: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
 14: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
 15: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
 16: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
 17: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
 18: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
 19: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
---
note: please make sure that you have updated to the latest nightly
note: rustc 1.89.0-nightly (e8a443daf 2025年06月10日) running on aarch64-unknown-linux-gnu
note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0
query stack during panic:
#0 [symbol_name] computing the symbol for `core::ptr::drop_in_place::<dyn* core::fmt::Debug> - shim(Some(dyn* core::fmt::Debug))`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
------------------------------------------
---- [ui] tests/ui/dyn-star/dyn-star-to-dyn.rs stdout ----
error: test compilation failed although it shouldn't!
status: exit status: 101
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/dyn-star/dyn-star-to-dyn.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "-O" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/dyn-star-to-dyn/a" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
--- stderr -------------------------------
warning: the feature `dyn_star` is incomplete and may not be safe to use and/or cause compiler crashes
##[warning] --> /checkout/tests/ui/dyn-star/dyn-star-to-dyn.rs:3:12
 |
LL | #![feature(dyn_star)]
 | ^^^^^^^^
 |
 = note: see issue #102425 <https://github.com/rust-lang/rust/issues/102425> for more information
 = note: `#[warn(incomplete_features)]` on by default
thread 'rustc' panicked at compiler/rustc_symbol_mangling/src/lib.rs:317:5:
compute_symbol_name: `_RNSNvYD*NtNtCs6z5DOJfU7oQ_4core3fmt5DebugEL_B6_3fmt5reifyCs4oCdeGFJcoB_15dyn_star_to_dyn` cannot be demangled
stack backtrace:
 0: __rustc::rust_begin_unwind
 1: core::panicking::panic_fmt
 2: rustc_symbol_mangling::symbol_name_provider
 [... omitted 3 frames ...]
 3: <rustc_middle::mir::mono::MonoItem>::symbol_name
 4: <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)>>::extend_trusted<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>::{closure#0}>::{closure#0}>
 5: <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)> as alloc::vec::spec_from_iter::SpecFromIter<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>>::from_iter
 6: rustc_monomorphize::partitioning::assert_symbols_are_distinct::<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>
 7: <rustc_session::session::Session>::time::<(&[rustc_middle::mir::mono::CodegenUnit], ()), rustc_monomorphize::partitioning::collect_and_partition_mono_items::{closure#0}>
 8: rustc_monomorphize::partitioning::collect_and_partition_mono_items
 [... omitted 3 frames ...]
 9: rustc_codegen_ssa::base::codegen_crate::<rustc_codegen_llvm::LlvmCodegenBackend>
 10: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
 11: rustc_interface::passes::start_codegen
 12: <rustc_interface::queries::Linker>::codegen_and_build_linker
 13: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
 14: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
 15: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
 16: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
 17: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
 18: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
 19: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
---
note: please make sure that you have updated to the latest nightly
note: rustc 1.89.0-nightly (e8a443daf 2025年06月10日) running on aarch64-unknown-linux-gnu
note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0
query stack during panic:
#0 [symbol_name] computing the symbol for `<dyn* core::fmt::Debug as core::fmt::Debug>::fmt - shim(reify)`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
warning: 1 warning emitted
------------------------------------------
---- [ui] tests/ui/dyn-star/make-dyn-star.rs stdout ----
error: test compilation failed although it shouldn't!
status: exit status: 101
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/dyn-star/make-dyn-star.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "-O" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/make-dyn-star/a" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
--- stderr -------------------------------
thread 'rustc' panicked at compiler/rustc_symbol_mangling/src/lib.rs:317:5:
compute_symbol_name: `_RINvNtCs6z5DOJfU7oQ_4core3ptr13drop_in_placeD*NtNtB4_3fmt5DebugEL_ECs2saRO9vAFuO_13make_dyn_star` cannot be demangled
stack backtrace:
 0: __rustc::rust_begin_unwind
 1: core::panicking::panic_fmt
 2: rustc_symbol_mangling::symbol_name_provider
 [... omitted 3 frames ...]
 3: <rustc_middle::mir::mono::MonoItem>::symbol_name
 4: <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)>>::extend_trusted<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>::{closure#0}>::{closure#0}>
 5: <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)> as alloc::vec::spec_from_iter::SpecFromIter<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>>::from_iter
 6: rustc_monomorphize::partitioning::assert_symbols_are_distinct::<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>
 7: <rustc_session::session::Session>::time::<(&[rustc_middle::mir::mono::CodegenUnit], ()), rustc_monomorphize::partitioning::collect_and_partition_mono_items::{closure#0}>
 8: rustc_monomorphize::partitioning::collect_and_partition_mono_items
 [... omitted 3 frames ...]
 9: rustc_codegen_ssa::base::codegen_crate::<rustc_codegen_llvm::LlvmCodegenBackend>
 10: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
 11: rustc_interface::passes::start_codegen
 12: <rustc_interface::queries::Linker>::codegen_and_build_linker
 13: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
 14: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
 15: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
 16: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
 17: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
 18: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
 19: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
---
note: please make sure that you have updated to the latest nightly
note: rustc 1.89.0-nightly (e8a443daf 2025年06月10日) running on aarch64-unknown-linux-gnu
note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0
query stack during panic:
#0 [symbol_name] computing the symbol for `core::ptr::drop_in_place::<dyn* core::fmt::Debug> - shim(Some(dyn* core::fmt::Debug))`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
------------------------------------------
---- [ui] tests/ui/dyn-star/no-explicit-dyn-star.rs stdout ----
error: auxiliary build of /checkout/tests/ui/dyn-star/auxiliary/dyn-star-foreign.rs failed to compile: 
status: exit status: 101
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/dyn-star/auxiliary/dyn-star-foreign.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/no-explicit-dyn-star/auxiliary" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers" "--crate-type" "dylib" "-L" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/no-explicit-dyn-star/auxiliary"
stdout: none
--- stderr -------------------------------
warning: the feature `dyn_star` is incomplete and may not be safe to use and/or cause compiler crashes
##[warning] --> /checkout/tests/ui/dyn-star/auxiliary/dyn-star-foreign.rs:1:12
 |
LL | #![feature(dyn_star)]
 | ^^^^^^^^
 |
 = note: see issue #102425 <https://github.com/rust-lang/rust/issues/102425> for more information
 = note: `#[warn(incomplete_features)]` on by default
---
 = note: `#[warn(dead_code)]` on by default
thread 'rustc' panicked at compiler/rustc_symbol_mangling/src/lib.rs:317:5:
compute_symbol_name: `_RINvNtCs6z5DOJfU7oQ_4core3ptr13drop_in_placeD*NtNtB4_3fmt7DisplayEL_ECs7dVpw2d4hBU_16dyn_star_foreign` cannot be demangled
stack backtrace:
 0: __rustc::rust_begin_unwind
 1: core::panicking::panic_fmt
 2: rustc_symbol_mangling::symbol_name_provider
 [... omitted 3 frames ...]
 3: <rustc_middle::mir::mono::MonoItem>::symbol_name
 4: <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)>>::extend_trusted<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>::{closure#0}>::{closure#0}>
 5: <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)> as alloc::vec::spec_from_iter::SpecFromIter<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>>::from_iter
 6: rustc_monomorphize::partitioning::assert_symbols_are_distinct::<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>
 7: <rustc_session::session::Session>::time::<(&[rustc_middle::mir::mono::CodegenUnit], ()), rustc_monomorphize::partitioning::collect_and_partition_mono_items::{closure#0}>
 8: rustc_monomorphize::partitioning::collect_and_partition_mono_items
 [... omitted 3 frames ...]
 9: rustc_codegen_ssa::back::symbol_export::exported_symbols_provider_local
 [... omitted 3 frames ...]
 10: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
 11: rustc_metadata::rmeta::encoder::encode_metadata
 12: rustc_metadata::fs::encode_and_write_metadata
 13: rustc_interface::passes::start_codegen
 14: <rustc_interface::queries::Linker>::codegen_and_build_linker
 15: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
 16: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
 17: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
 18: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
 19: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
 20: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
 21: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
---
note: please make sure that you have updated to the latest nightly
note: rustc 1.89.0-nightly (e8a443daf 2025年06月10日) running on aarch64-unknown-linux-gnu
note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0 --crate-type dylib
query stack during panic:
#0 [symbol_name] computing the symbol for `core::ptr::drop_in_place::<dyn* core::fmt::Display> - shim(Some(dyn* core::fmt::Display))`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
#2 [exported_symbols] collecting exported symbols for crate `0`
end of query stack
warning: 2 warnings emitted
------------------------------------------
---- [ui] tests/ui/dyn-star/method.rs stdout ----
error: test compilation failed although it shouldn't!
status: exit status: 101
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/dyn-star/method.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "-O" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/method/a" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
--- stderr -------------------------------
thread 'rustc' panicked at compiler/rustc_symbol_mangling/src/lib.rs:317:5:
compute_symbol_name: `_RINvNtCs6z5DOJfU7oQ_4core3ptr13drop_in_placeD*NtCs7whv7xAvSAi_6method3FooEL_EBK_` cannot be demangled
stack backtrace:
 0: __rustc::rust_begin_unwind
 1: core::panicking::panic_fmt
 2: rustc_symbol_mangling::symbol_name_provider
 [... omitted 3 frames ...]
 3: <rustc_middle::mir::mono::MonoItem>::symbol_name
 4: <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)>>::extend_trusted<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>::{closure#0}>::{closure#0}>
 5: <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)> as alloc::vec::spec_from_iter::SpecFromIter<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>>::from_iter
 6: rustc_monomorphize::partitioning::assert_symbols_are_distinct::<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>
 7: <rustc_session::session::Session>::time::<(&[rustc_middle::mir::mono::CodegenUnit], ()), rustc_monomorphize::partitioning::collect_and_partition_mono_items::{closure#0}>
 8: rustc_monomorphize::partitioning::collect_and_partition_mono_items
 [... omitted 3 frames ...]
 9: rustc_codegen_ssa::base::codegen_crate::<rustc_codegen_llvm::LlvmCodegenBackend>
 10: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
 11: rustc_interface::passes::start_codegen
 12: <rustc_interface::queries::Linker>::codegen_and_build_linker
 13: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
 14: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
 15: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
 16: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
 17: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
 18: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
 19: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
---
note: please make sure that you have updated to the latest nightly
note: rustc 1.89.0-nightly (e8a443daf 2025年06月10日) running on aarch64-unknown-linux-gnu
note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0
query stack during panic:
#0 [symbol_name] computing the symbol for `core::ptr::drop_in_place::<dyn* Foo> - shim(Some(dyn* Foo))`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
------------------------------------------
---- [ui] tests/ui/dyn-star/no-implicit-dyn-star.rs stdout ----
error: auxiliary build of /checkout/tests/ui/dyn-star/auxiliary/dyn-star-foreign.rs failed to compile: 
status: exit status: 101
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/dyn-star/auxiliary/dyn-star-foreign.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--check-cfg" "cfg(test,FALSE)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/no-implicit-dyn-star/auxiliary" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers" "--crate-type" "dylib" "-L" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/dyn-star/no-implicit-dyn-star/auxiliary"
stdout: none
--- stderr -------------------------------
warning: the feature `dyn_star` is incomplete and may not be safe to use and/or cause compiler crashes
##[warning] --> /checkout/tests/ui/dyn-star/auxiliary/dyn-star-foreign.rs:1:12
 |
LL | #![feature(dyn_star)]
 | ^^^^^^^^
 |
 = note: see issue #102425 <https://github.com/rust-lang/rust/issues/102425> for more information
 = note: `#[warn(incomplete_features)]` on by default
---
 = note: `#[warn(dead_code)]` on by default
thread 'rustc' panicked at compiler/rustc_symbol_mangling/src/lib.rs:317:5:
compute_symbol_name: `_RINvNtCs6z5DOJfU7oQ_4core3ptr13drop_in_placeD*NtNtB4_3fmt7DisplayEL_ECs7dVpw2d4hBU_16dyn_star_foreign` cannot be demangled
stack backtrace:
 0: __rustc::rust_begin_unwind
 1: core::panicking::panic_fmt
 2: rustc_symbol_mangling::symbol_name_provider
 [... omitted 3 frames ...]
 3: <rustc_middle::mir::mono::MonoItem>::symbol_name
 4: <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)>>::extend_trusted<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>::{closure#0}>::{closure#0}>
 5: <alloc::vec::Vec<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName)> as alloc::vec::spec_from_iter::SpecFromIter<(&rustc_middle::mir::mono::MonoItem, rustc_middle::ty::SymbolName), core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>, rustc_monomorphize::partitioning::assert_symbols_are_distinct<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>::{closure#0}>>>::from_iter
 6: rustc_monomorphize::partitioning::assert_symbols_are_distinct::<core::slice::iter::Iter<rustc_middle::mir::mono::MonoItem>>
 7: <rustc_session::session::Session>::time::<(&[rustc_middle::mir::mono::CodegenUnit], ()), rustc_monomorphize::partitioning::collect_and_partition_mono_items::{closure#0}>
 8: rustc_monomorphize::partitioning::collect_and_partition_mono_items
 [... omitted 3 frames ...]
 9: rustc_codegen_ssa::back::symbol_export::exported_symbols_provider_local
 [... omitted 3 frames ...]
 10: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
 11: rustc_metadata::rmeta::encoder::encode_metadata
 12: rustc_metadata::fs::encode_and_write_metadata
 13: rustc_interface::passes::start_codegen
 14: <rustc_interface::queries::Linker>::codegen_and_build_linker
 15: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
 16: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
 17: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
 18: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
 19: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
 20: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
 21: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
---
note: please make sure that you have updated to the latest nightly
note: rustc 1.89.0-nightly (e8a443daf 2025年06月10日) running on aarch64-unknown-linux-gnu
note: compiler flags: -Z threads=1 -Z simulate-remapped-rust-src-base=/rustc/FAKE_PREFIX -Z translate-remapped-path-to-local-path=no -Z ignore-directory-in-diagnostics-source-blocks=/cargo -Z ignore-directory-in-diagnostics-source-blocks=/checkout/vendor -C codegen-units=1 -Z ui-testing -Z deduplicate-diagnostics=no -Z write-long-types-to-disk=no -C strip=debuginfo -C prefer-dynamic -C rpath -C debuginfo=0 --crate-type dylib
query stack during panic:
#0 [symbol_name] computing the symbol for `core::ptr::drop_in_place::<dyn* core::fmt::Display> - shim(Some(dyn* core::fmt::Display))`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
#2 [exported_symbols] collecting exported symbols for crate `0`
end of query stack
warning: 2 warnings emitted
------------------------------------------
---- [ui] tests/ui/panics/short-ice-remove-middle-frames-2.rs stdout ----
Saved the actual run.stderr to `/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/panics/short-ice-remove-middle-frames-2/short-ice-remove-middle-frames-2.run.stderr`
diff of run.stderr:
4 stack backtrace:
5 0: std::panicking::begin_panic
6 1: short_ice_remove_middle_frames_2::eight
- 2: short_ice_remove_middle_frames_2::seven::{{closure}}
+ 2: short_ice_remove_middle_frames_2::seven::{closure#0}
8 [... omitted 3 frames ...]
9 3: short_ice_remove_middle_frames_2::fifth
- 4: short_ice_remove_middle_frames_2::fourth::{{closure}}
+ 4: short_ice_remove_middle_frames_2::fourth::{closure#0}
11 [... omitted 4 frames ...]
12 5: short_ice_remove_middle_frames_2::first
13 6: short_ice_remove_middle_frames_2::main
- 7: core::ops::function::FnOnce::call_once
+ 7: <fn() as core::ops::function::FnOnce<()>>::call_once
15 note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
16 
The actual run.stderr differed from the expected run.stderr
error: 1 errors occurred comparing run output.
status: exit status: 101
command: cd "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/panics/short-ice-remove-middle-frames-2" && RUSTC="/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" RUST_BACKTRACE="1" RUST_TEST_THREADS="4" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/panics/short-ice-remove-middle-frames-2/a"
stdout: none
--- stderr -------------------------------
thread 'main' panicked at /checkout/tests/ui/panics/short-ice-remove-middle-frames-2.rs:62:5:
debug!!!
stack backtrace:
 0: std::panicking::begin_panic::<&str>
 1: short_ice_remove_middle_frames_2::eight
 2: short_ice_remove_middle_frames_2::seven::{closure#0}
 [... omitted 3 frames ...]
 3: short_ice_remove_middle_frames_2::fifth
 4: short_ice_remove_middle_frames_2::fourth::{closure#0}
 [... omitted 4 frames ...]
 5: short_ice_remove_middle_frames_2::first
 6: short_ice_remove_middle_frames_2::main
 7: <fn() as core::ops::function::FnOnce<()>>::call_once
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
------------------------------------------
---- [ui] tests/ui/panics/short-ice-remove-middle-frames.rs stdout ----
Saved the actual run.stderr to `/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/panics/short-ice-remove-middle-frames/short-ice-remove-middle-frames.run.stderr`
diff of run.stderr:
5 0: std::panicking::begin_panic
6 1: short_ice_remove_middle_frames::seven
7 2: short_ice_remove_middle_frames::sixth
- 3: short_ice_remove_middle_frames::fifth::{{closure}}
+ 3: short_ice_remove_middle_frames::fifth::{closure#0}
9 [... omitted 4 frames ...]
10 4: short_ice_remove_middle_frames::second
- 5: short_ice_remove_middle_frames::first::{{closure}}
+ 5: short_ice_remove_middle_frames::first::{closure#0}
12 6: short_ice_remove_middle_frames::first
13 7: short_ice_remove_middle_frames::main
- 8: core::ops::function::FnOnce::call_once
+ 8: <fn() as core::ops::function::FnOnce<()>>::call_once
15 note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
16 
---
thread 'main' panicked at /checkout/tests/ui/panics/short-ice-remove-middle-frames.rs:58:5:
debug!!!
stack backtrace:
 0: std::panicking::begin_panic::<&str>
 1: short_ice_remove_middle_frames::seven
 2: short_ice_remove_middle_frames::sixth
 3: short_ice_remove_middle_frames::fifth::{closure#0}
 [... omitted 4 frames ...]
 4: short_ice_remove_middle_frames::second
 5: short_ice_remove_middle_frames::first::{closure#0}
 6: short_ice_remove_middle_frames::first
 7: short_ice_remove_middle_frames::main
 8: <fn() as core::ops::function::FnOnce<()>>::call_once
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
------------------------------------------
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rust-bors bot commented Jun 10, 2025

☀️ Try build successful (CI)
Build commit: fd86cbb (fd86cbb3745ac7ba4ec1680cfa420fb01fc4af1a)

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Finished benchmarking commit (fd86cbb): comparison URL.

Overall result: ❌ regressions - please read the text below

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

Next Steps: If you can justify the regressions found in this try perf run, please do so in sufficient writing along with @rustbot label: +perf-regression-triaged. If not, please fix the regressions and do another perf run. If its results are neutral or positive, the label will be automatically removed.

@bors rollup=never
@rustbot label: -S-waiting-on-perf +perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

mean range count
Regressions ❌
(primary)		 0.7% [0.2%, 1.4%] 44
Regressions ❌
(secondary)		 0.8% [0.2%, 1.3%] 34
Improvements ✅
(primary)		 - - 0
Improvements ✅
(secondary)		 -0.5% [-0.6%, -0.5%] 2
All ❌✅ (primary) 0.7% [0.2%, 1.4%] 44

Max RSS (memory usage)

Results (primary 2.7%, secondary -2.2%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 2.7% [0.9%, 4.4%] 8
Regressions ❌
(secondary)		 - - 0
Improvements ✅
(primary)		 - - 0
Improvements ✅
(secondary)		 -2.2% [-2.2%, -2.2%] 1
All ❌✅ (primary) 2.7% [0.9%, 4.4%] 8

Cycles

Results (primary 1.0%, secondary -2.3%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 1.0% [0.9%, 1.1%] 2
Regressions ❌
(secondary)		 - - 0
Improvements ✅
(primary)		 - - 0
Improvements ✅
(secondary)		 -2.3% [-2.3%, -2.3%] 1
All ❌✅ (primary) 1.0% [0.9%, 1.1%] 2

Binary size

Results (primary 4.6%, secondary 5.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 5.6% [0.0%, 16.1%] 112
Regressions ❌
(secondary)		 6.6% [0.0%, 16.1%] 112
Improvements ✅
(primary)		 -0.1% [-0.2%, -0.0%] 23
Improvements ✅
(secondary)		 -2.5% [-18.2%, -0.0%] 24
All ❌✅ (primary) 4.6% [-0.2%, 16.1%] 135

Bootstrap: 755.155s -> 754.628s (-0.07%)
Artifact size: 372.17 MiB -> 372.45 MiB (0.07%)

@rustbot rustbot removed the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jun 10, 2025
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