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Infinite/long backtrace on i686 under Wine #135717

Open
Labels
A-backtraceArea: Backtraces A-debuginfoArea: Debugging information in compiled programs (DWARF, PDB, etc.) A-panicArea: Panicking machinery A-runtimeArea: std's runtime and "pre-main" init for handling backtraces, unwinds, stack overflows C-bugCategory: This is a bug. E-needs-investigationCall for partcipation: This issues needs some investigation to determine current status O-windowsOperating system: Windows O-x86_32Target: x86 processors, 32 bit (like i686-*) (also known as IA-32, i386, i586, i686) T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.
@purplesyringa

Description

I'm not sure where to file this bug, but it affects Rust more than other languages for reasons explained below, so let's at least make this visible here.

I tried running this code:

fn main() {
 panic!("Hello, world!");
}

with RUST_BACKTRACE=full under Wine.

I expected to see this happen: a short backtrace.

Instead, this happened: an infinite backtrace on i686-pc-windows-msvc and a finite, but longer than necessary, repetitive, and clearly wrong backtrace on i686-pc-windows-gnu.

This might not seem like much (does anyone use RUST_BACKTRACE=full in production?), but Rust forces a full backtrace on double panic, so panics in destructors effectively hang the process instead of aborting it. Beautiful.

I think it's fair to say that this is likely a Wine bug, however, I think it's also possible that LLVM generates wrong SEH frames, which Windows handles correctly only by chance. As a workaround, we might want to somewhat limit the backtrace length even on double panic?

Meta

rustc --version --verbose:

rustc 1.86.0-nightly (419b3e2d3 2025年01月15日)
binary: rustc
commit-hash: 419b3e2d3e350822550eee0e82eeded4d324d584
commit-date: 2025年01月15日
host: x86_64-unknown-linux-gnu
release: 1.86.0-nightly
LLVM version: 19.1.6

wine --version: wine-9.22 (Staging)

I'm cross-compiling for Windows with cargo-xwin for MSVC ABI and cross for GNU ABI:

  • XWIN_ARCH=x86 RUST_BACKTRACE=full cargo xwin run --target i686-pc-windows-msvc
  • RUST_BACKTRACE=full cross run --target i686-pc-windows-gnu

...but I have checked that the problem can be reproduced with executables built natively on Windows.

RUST_BACKTRACE=full backtrace on MSVC 
thread 'main' panicked at src/main.rs:10:5:
Hello, world!
stack backtrace:
0024:fixme:dbghelp:i386_stack_walk new PC=833875c0 different from Eip=40b4ab
 0: 0x40b4ab - fmt
 1: 0x40b4ab - core::fmt::write
[the above lines repeated endlessly, with nothing but the frame depth changing]
RUST_BACKTRACE=full backtrace on GNU 
thread 'main' panicked at src/main.rs:10:5:
Hello, world!
stack backtrace:
015c:fixme:dbghelp:elf_search_auxv can't find symbol in module
015c:fixme:dbghelp:elf_search_auxv can't find symbol in module
015c:fixme:dbghelp:elf_search_auxv can't find symbol in module
015c:fixme:dbghelp:elf_search_auxv can't find symbol in module
015c:fixme:dbghelp:elf_search_auxv can't find symbol in module
015c:fixme:dbghelp:elf_search_auxv can't find symbol in module
015c:fixme:dbghelp:elf_search_auxv can't find symbol in module
015c:fixme:dbghelp:elf_search_auxv can't find symbol in module
015c:fixme:dbghelp:elf_search_auxv can't find symbol in module
015c:fixme:dbghelp:elf_search_auxv can't find symbol in module
015c:fixme:dbghelp:elf_search_auxv can't find symbol in module
015c:fixme:dbghelp:elf_search_auxv can't find symbol in module
015c:fixme:dbghelp:elf_search_auxv can't find symbol in module
015c:fixme:dbghelp_dwarf:dwarf2_parse_udt_type Unhandled Tag type 0x33 at debug_info(abbrev:014D0610,symt:011EE5A0) in ctx(011E05E0,L"cringe")
015c:fixme:dbghelp_dwarf:dwarf2_parse_udt_type Unhandled Tag type 0x33 at debug_info(abbrev:014D0610,symt:011EE620) in ctx(011E05E0,L"cringe")
015c:fixme:dbghelp_dwarf:dwarf2_parse_udt_type Unhandled Tag type 0x33 at debug_info(abbrev:014D0610,symt:011EE720) in ctx(011E05E0,L"cringe")
015c:fixme:dbghelp_dwarf:dwarf2_parse_udt_type Unhandled Tag type 0x33 at debug_info(abbrev:014D0610,symt:025000B8) in ctx(011E05E0,L"cringe")
015c:fixme:dbghelp_dwarf:dwarf2_parse_udt_type Unhandled Tag type 0x33 at debug_info(abbrev:014D0610,symt:02500138) in ctx(011E05E0,L"cringe")
015c:fixme:dbghelp_dwarf:dwarf2_parse_udt_type Unhandled Tag type 0x33 at debug_info(abbrev:014D0610,symt:02500238) in ctx(011E05E0,L"cringe")
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 0: 0x48406b - core::fmt::rt::Argument::fmt::h8360d965bd1e2b6e
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src\fmt/rt.rs:177:76
 1: 0x48406b - core::fmt::write::hd923a73d9d161bb0
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src\fmt/mod.rs:1440:21
 2: 0x48406b - core::fmt::rt::Argument::fmt::h8360d965bd1e2b6e
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src\fmt/rt.rs:177:76
 3: 0x48406b - core::fmt::write::hd923a73d9d161bb0
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src\fmt/mod.rs:1440:21
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 4: 0x434015 - std::io::Write::write_fmt::had1d59cd6160ac1d
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src\io/mod.rs:1887:15
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 5: 0x43dd85 - std::sys::backtrace::BacktraceLock::print::hd49d4d80db29b827
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src\sys/backtrace.rs:42:9
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 6: 0x440387 - std::panicking::default_hook::{{closure}}::hd20fad6770713ea0
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:298:22
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 7: 0x4401d0 - std::panicking::default_hook::h1a8c8518394b8a18
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:325:9
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 8: 0x440df5 - std::panicking::rust_panic_with_hook::h9da62b45b00ce8e2
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:831:13
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 9: 0x440b84 - std::panicking::begin_panic_handler::{{closure}}::h2f73c259c0a62ae3
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:697:13
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 10: 0x43e8ab - std::sys::backtrace::__rust_end_short_backtrace::h8d127ac41d00cbaf
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src\sys/backtrace.rs:168:18
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 11: 0x4408ae - rust_begin_unwind
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:695:5
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 12: 0x4806f1 - core::panicking::panic_fmt::hffd0c350f3e911e2
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src/panicking.rs:75:14
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 13: 0x40166f - cringe::main::he8e076d3e00c6e43
 at /home/purplesyringa/cringe/src/main.rs:10:5
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 14: 0x401809 - core::ops::function::FnOnce::call_once::hab1ff5b455ae04c6
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584\library\core\src\ops\function.rs:250:5
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 15: 0x401791 - std::sys::backtrace::__rust_begin_short_backtrace::hf837e3a1102d85cf
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584\library\std\src\sys\backtrace.rs:152:18
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 16: 0x401773 - std::rt::lang_start::{{closure}}::h0ed424ef8b484891
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584\library\std\src\rt.rs:194:18
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 17: 0x426745 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h8eb84feb54c9cb1d
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src\ops/function.rs:284:13
 18: 0x426745 - std::panicking::try::do_call::hfdc2187cea17d7ae
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 19: 0x426745 - std::panicking::try::h906cdc33b1ce235a
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 20: 0x426745 - std::panic::catch_unwind::he80bb62fbfbcf0ee
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 21: 0x426745 - std::rt::lang_start_internal::{{closure}}::h66a7d6bdfa5b0443
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:163:24
 22: 0x426745 - std::panicking::try::do_call::hbe592467235de060
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 23: 0x426745 - std::panicking::try::h887ebabf70af544c
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 24: 0x426745 - std::panic::catch_unwind::he0bcf444777fac47
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 25: 0x426745 - std::rt::lang_start_internal::hf4c77c5234ec0509
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:159:5
 26: 0x426745 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h8eb84feb54c9cb1d
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src\ops/function.rs:284:13
 27: 0x426745 - std::panicking::try::do_call::hfdc2187cea17d7ae
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 28: 0x426745 - std::panicking::try::h906cdc33b1ce235a
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 29: 0x426745 - std::panic::catch_unwind::he80bb62fbfbcf0ee
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 30: 0x426745 - std::rt::lang_start_internal::{{closure}}::h66a7d6bdfa5b0443
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:163:24
 31: 0x426745 - std::panicking::try::do_call::hbe592467235de060
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 32: 0x426745 - std::panicking::try::h887ebabf70af544c
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 33: 0x426745 - std::panic::catch_unwind::he0bcf444777fac47
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 34: 0x426745 - std::rt::lang_start_internal::hf4c77c5234ec0509
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:159:5
 35: 0x426745 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h8eb84feb54c9cb1d
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src\ops/function.rs:284:13
 36: 0x426745 - std::panicking::try::do_call::hfdc2187cea17d7ae
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 37: 0x426745 - std::panicking::try::h906cdc33b1ce235a
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 38: 0x426745 - std::panic::catch_unwind::he80bb62fbfbcf0ee
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 39: 0x426745 - std::rt::lang_start_internal::{{closure}}::h66a7d6bdfa5b0443
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:163:24
 40: 0x426745 - std::panicking::try::do_call::hbe592467235de060
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 41: 0x426745 - std::panicking::try::h887ebabf70af544c
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 42: 0x426745 - std::panic::catch_unwind::he0bcf444777fac47
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 43: 0x426745 - std::rt::lang_start_internal::hf4c77c5234ec0509
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:159:5
 44: 0x426745 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h8eb84feb54c9cb1d
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src\ops/function.rs:284:13
 45: 0x426745 - std::panicking::try::do_call::hfdc2187cea17d7ae
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 46: 0x426745 - std::panicking::try::h906cdc33b1ce235a
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 47: 0x426745 - std::panic::catch_unwind::he80bb62fbfbcf0ee
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 48: 0x426745 - std::rt::lang_start_internal::{{closure}}::h66a7d6bdfa5b0443
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:163:24
 49: 0x426745 - std::panicking::try::do_call::hbe592467235de060
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 50: 0x426745 - std::panicking::try::h887ebabf70af544c
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 51: 0x426745 - std::panic::catch_unwind::he0bcf444777fac47
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 52: 0x426745 - std::rt::lang_start_internal::hf4c77c5234ec0509
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:159:5
 53: 0x426745 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h8eb84feb54c9cb1d
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src\ops/function.rs:284:13
 54: 0x426745 - std::panicking::try::do_call::hfdc2187cea17d7ae
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 55: 0x426745 - std::panicking::try::h906cdc33b1ce235a
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 56: 0x426745 - std::panic::catch_unwind::he80bb62fbfbcf0ee
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 57: 0x426745 - std::rt::lang_start_internal::{{closure}}::h66a7d6bdfa5b0443
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:163:24
 58: 0x426745 - std::panicking::try::do_call::hbe592467235de060
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 59: 0x426745 - std::panicking::try::h887ebabf70af544c
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 60: 0x426745 - std::panic::catch_unwind::he0bcf444777fac47
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 61: 0x426745 - std::rt::lang_start_internal::hf4c77c5234ec0509
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:159:5
 62: 0x426745 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h8eb84feb54c9cb1d
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src\ops/function.rs:284:13
 63: 0x426745 - std::panicking::try::do_call::hfdc2187cea17d7ae
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 64: 0x426745 - std::panicking::try::h906cdc33b1ce235a
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 65: 0x426745 - std::panic::catch_unwind::he80bb62fbfbcf0ee
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 66: 0x426745 - std::rt::lang_start_internal::{{closure}}::h66a7d6bdfa5b0443
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:163:24
 67: 0x426745 - std::panicking::try::do_call::hbe592467235de060
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 68: 0x426745 - std::panicking::try::h887ebabf70af544c
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 69: 0x426745 - std::panic::catch_unwind::he0bcf444777fac47
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 70: 0x426745 - std::rt::lang_start_internal::hf4c77c5234ec0509
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:159:5
 71: 0x426745 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h8eb84feb54c9cb1d
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src\ops/function.rs:284:13
 72: 0x426745 - std::panicking::try::do_call::hfdc2187cea17d7ae
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 73: 0x426745 - std::panicking::try::h906cdc33b1ce235a
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 74: 0x426745 - std::panic::catch_unwind::he80bb62fbfbcf0ee
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 75: 0x426745 - std::rt::lang_start_internal::{{closure}}::h66a7d6bdfa5b0443
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:163:24
 76: 0x426745 - std::panicking::try::do_call::hbe592467235de060
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 77: 0x426745 - std::panicking::try::h887ebabf70af544c
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 78: 0x426745 - std::panic::catch_unwind::he0bcf444777fac47
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 79: 0x426745 - std::rt::lang_start_internal::hf4c77c5234ec0509
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:159:5
 80: 0x426745 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h8eb84feb54c9cb1d
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src\ops/function.rs:284:13
 81: 0x426745 - std::panicking::try::do_call::hfdc2187cea17d7ae
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 82: 0x426745 - std::panicking::try::h906cdc33b1ce235a
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 83: 0x426745 - std::panic::catch_unwind::he80bb62fbfbcf0ee
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 84: 0x426745 - std::rt::lang_start_internal::{{closure}}::h66a7d6bdfa5b0443
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:163:24
 85: 0x426745 - std::panicking::try::do_call::hbe592467235de060
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 86: 0x426745 - std::panicking::try::h887ebabf70af544c
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 87: 0x426745 - std::panic::catch_unwind::he0bcf444777fac47
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 88: 0x426745 - std::rt::lang_start_internal::hf4c77c5234ec0509
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:159:5
 89: 0x426745 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h8eb84feb54c9cb1d
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\core\src\ops/function.rs:284:13
 90: 0x426745 - std::panicking::try::do_call::hfdc2187cea17d7ae
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 91: 0x426745 - std::panicking::try::h906cdc33b1ce235a
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 92: 0x426745 - std::panic::catch_unwind::he80bb62fbfbcf0ee
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 93: 0x426745 - std::rt::lang_start_internal::{{closure}}::h66a7d6bdfa5b0443
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:163:24
 94: 0x426745 - std::panicking::try::do_call::hbe592467235de060
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:587:40
 95: 0x426745 - std::panicking::try::h887ebabf70af544c
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panicking.rs:550:19
 96: 0x426745 - std::panic::catch_unwind::he0bcf444777fac47
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/panic.rs:358:14
 97: 0x426745 - std::rt::lang_start_internal::hf4c77c5234ec0509
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584/library\std\src/rt.rs:159:5
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 98: 0x40174b - std::rt::lang_start::h59c4269b4dacd45e
 at /rustc/419b3e2d3e350822550eee0e82eeded4d324d584\library\std\src\rt.rs:193:5
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 99: 0x4016ae - _main
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 100: 0x401386 - __tmainCRTStartup
 at ./build/i686-w64-mingw32-i686-w64-mingw32-crt/./mingw-w64-crt/crt/crtexe.c:339:15
015c:fixme:dbghelp_dwarf:parse_cie_details unknown CIE version 20 at 019E5928
 101: 0x785194c0 - @BaseThreadInitThunk@12
 102: 0x786c9aa3 - _call_thread_func_wrapper
 103: 0x786caef2 - call_thread_func
 at /usr/src/packages/BUILD/dlls/ntdll/signal_i386.c:603:9

@rustbot label +A-backtrace +A-debuginfo +A-panic +A-runtime +E-needs-investigation +O-windows +O-x86_32 +T-compiler

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    A-backtraceArea: Backtraces A-debuginfoArea: Debugging information in compiled programs (DWARF, PDB, etc.) A-panicArea: Panicking machinery A-runtimeArea: std's runtime and "pre-main" init for handling backtraces, unwinds, stack overflows C-bugCategory: This is a bug. E-needs-investigationCall for partcipation: This issues needs some investigation to determine current status O-windowsOperating system: Windows O-x86_32Target: x86 processors, 32 bit (like i686-*) (also known as IA-32, i386, i586, i686) T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

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