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Memory corruption take 2 #461

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Open
@kateinoigakukun

Description

I still see the following crash if I re-enable the Examples/Testing tests.

// FIXME: This test fails on Swift 6.3 and later due to memory corruption
// Enable it back when https://github.com/swiftlang/swift-driver/pull/1987 is included in the snapshot

 RuntimeError: memory access out of bounds
 at CounterPackageTests.xctest.dlmalloc (wasm://wasm/CounterPackageTests.xctest-0f40d596:wasm-function[89702]:0x115e7de)
 at CounterPackageTests.xctest.malloc (wasm://wasm/CounterPackageTests.xctest-0f40d596:wasm-function[89701]:0x115e22a)
 at CounterPackageTests.xctest.swift::Demangle::__runtime::Demangler::demangleBoundGenerics(swift::Demangle::__runtime::Vector<swift::Demangle::__runtime::Node*>&, swift::Demangle::__runtime::Node*&) (wasm://wasm/CounterPackageTests.xctest-0f40d596:wasm-function[28248]:0x522adc)
 at CounterPackageTests.xctest.swift::Demangle::__runtime::Demangler::demangleBoundGenericType() (wasm://wasm/CounterPackageTests.xctest-0f40d596:wasm-function[28200]:0x512379)
 at CounterPackageTests.xctest.swift::Demangle::__runtime::Demangler::demangleOperator() (wasm://wasm/CounterPackageTests.xctest-0f40d596:wasm-function[28174]:0x50e156)
 at CounterPackageTests.xctest.swift::Demangle::__runtime::Demangler::demangleType(__swift::__runtime::llvm::StringRef, std::__2::function<swift::Demangle::__runtime::Node* (swift::Demangle::__runtime::SymbolicReferenceKind, swift::Demangle::__runtime::Directness, int, void const*)>) (wasm://wasm/CounterP
ackageTests.xctest-0f40d596:wasm-function[28172]:0x50db25)
 at CounterPackageTests.xctest.swift_getTypeByMangledName (wasm://wasm/CounterPackageTests.xctest-0f40d596:wasm-function[27912]:0x4ee2ad)
 at CounterPackageTests.xctest.(anonymous namespace)::DecodedMetadataBuilder::resolveOpaqueType(swift::Demangle::__runtime::Node*, __swift::__runtime::llvm::ArrayRef<__swift::__runtime::llvm::ArrayRef<swift::MetadataPackOrValue>>, unsigned int) (wasm://wasm/CounterPackageTests.xctest-0f40d596:wasm-functio
n[27992]:0x500764)
 at CounterPackageTests.xctest.swift::Demangle::__runtime::TypeDecoder<(anonymous namespace)::DecodedMetadataBuilder>::decodeMangledType(swift::Demangle::__runtime::Node*, unsigned int, bool) (wasm://wasm/CounterPackageTests.xctest-0f40d596:wasm-function[27925]:0x4f3cfe)
 at CounterPackageTests.xctest.swift::Demangle::__runtime::TypeDecoder<(anonymous namespace)::DecodedMetadataBuilder>::decodeGenericArgs(swift::Demangle::__runtime::Node*, unsigned int, __swift::__runtime::llvm::SmallVectorImpl<swift::MetadataPackOrValue>&) (wasm://wasm/CounterPackageTests.xctest-0f40d596
:wasm-function[27971]:0x4fc426)

Toolchain version: DEVELOPMENT-SNAPSHOT-2025年10月02日-a

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