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[SR-12355] Memory ownership verification failure with -O #54789

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porterchild opened this issue Mar 12, 2020 · 3 comments
Closed

[SR-12355] Memory ownership verification failure with -O #54789

porterchild opened this issue Mar 12, 2020 · 3 comments
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler itself

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@porterchild
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Previous ID SR-12355
Radar rdar://problem/60832805
Original Reporter @porterchild
Type Bug
Status Resolved
Resolution Done
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug
Assignee None
Priority Medium

md5: 1bb6c92c3c5d2b6ef096d5e7cc2d1d10

Issue Description:

Here is a mini-fied reproducer of some code that causes a compiler crash (only when compiling with optimizations).

public struct Straducken {
    struct A {
        var things = Array<Int>()
    }
    
    var a = A()

    mutating func moreOfAFunctionReally() {
        var n = 0
        for _ in 0..<1{
           n += 1
        }
                
        self.a = A()
        self.a.things = []
    }
}

If I get rid of the loop, `self.a = A()`, or `self.a.things = []`, it builds.

Crash info summary:

SIL memory lifetime failure in @$s6delete10StraduckenV21moreOfAFunctionReallyyyF: memory is not initialized, but should 
memory location:   %80 = struct_element_addr %79 : $*Straducken.A, #Straducken.A.things // user: %81 
at instruction:   debug_value_addr %0 : $*Straducken, var, name "self", argno 1 // id: %3

Full crash info:

CompileSwift normal x86_64 /Users/porter/Dropbox\ (PassiveLogic)/Team/Team\ Members\ Scratch\ Space/Porter/Experiments/Playgrounds/delete/delete/main.swift (in target 'delete' from project 'delete')
    cd /Users/porter/Dropbox\ (PassiveLogic)/Team/Team\ Members\ Scratch\ Space/Porter/Experiments/Playgrounds/delete
    /Library/Developer/Toolchains/swift-tensorflow-DEVELOPMENT-2020-03-04-a.xctoolchain/usr/bin/swift -frontend -c /Users/porter/Dropbox\ \(PassiveLogic\)/Team/Team\ Members\ Scratch\ Space/Porter/Experiments/Playgrounds/delete/delete/main.swift -emit-module-path /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/delete.swiftmodule -emit-module-doc-path /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/delete.swiftdoc -emit-module-source-info-path /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/delete.swiftsourceinfo -serialize-diagnostics-path /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/delete-master.dia -emit-objc-header-path /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/delete-Swift.h -emit-dependencies-path /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/delete-master.d -target x86_64-apple-macos10.14 -enable-objc-interop -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -I /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Products/Release -F /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Products/Release -g -module-cache-path /Users/porter/Library/Developer/Xcode/DerivedData/ModuleCache.noindex -swift-version 5 -enforce-exclusivity=unchecked -O -remove-runtime-asserts -serialize-debugging-options -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/swift-overrides.hmap -Xcc -iquote -Xcc /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/delete-generated-files.hmap -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/delete-own-target-headers.hmap -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/delete-all-target-headers.hmap -Xcc -iquote -Xcc /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/delete-project-headers.hmap -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Products/Release/include -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/DerivedSources-normal/x86_64 -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/DerivedSources/x86_64 -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/DerivedSources -Xcc -working-directory/Users/porter/Dropbox\ \(PassiveLogic\)/Team/Team\ Members\ Scratch\ Space/Porter/Experiments/Playgrounds/delete -module-name delete -num-threads 4 -o /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/main.o


SIL memory lifetime failure in @$s6delete10StraduckenV21moreOfAFunctionReallyyyF: memory is not initialized, but should
memory location:   %80 = struct_element_addr %79 : $*Straducken.A, #Straducken.A.things // user: %81
at instruction:   debug_value_addr %0 : $*Straducken, var, name "self", argno 1 // id: %3


in function:
// Straducken.moreOfAFunctionReally()
sil hidden [ossa] @$s6delete10StraduckenV21moreOfAFunctionReallyyyF : $@convention(method) (@inout Straducken) -> () {
// %0                                             // users: %1, %78, %68, %64, %3
bb0(%0 : $*Straducken):
  %1 = struct_element_addr %0 : $*Straducken, #Straducken.a // user: %2
  destroy_addr %1 : $*Straducken.A                // id: %2
  debug_value_addr %0 : $*Straducken, var, name "self", argno 1 // id: %3
  %4 = alloc_stack $Int, var, name "n"            // users: %83, %7, %50
  %5 = integer_literal $Builtin.Int64, 0          // user: %6
  %6 = struct $Int (%5 : $Builtin.Int64)          // user: %7
  store %6 to [trivial] %4 : $*Int                // id: %7
  %8 = alloc_stack $IndexingIterator<Range<Int>>, var, name "$generator" // users: %32, %63, %40
  %9 = alloc_stack $Range<Int>                    // users: %24, %35, %28
  %10 = metatype $@thin Int.Type
  %11 = integer_literal $Builtin.Int64, 0         // user: %12
  %12 = struct $Int (%11 : $Builtin.Int64)        // user: %20
  %13 = integer_literal $Builtin.Int64, 1         // user: %14
  %14 = struct $Int (%13 : $Builtin.Int64)        // user: %22
  br bb1                                          // id: %15


bb1:                                              // Preds: bb0
  br bb3                                          // id: %16


bb2:                                              // Preds: bb4
  %17 = tuple ()
  %18 = metatype $@thin Range<Int>.Type           // user: %24
  %19 = alloc_stack $Int                          // users: %20, %26, %24
  store %12 to [trivial] %19 : $*Int              // id: %20
  %21 = alloc_stack $Int                          // users: %22, %25, %24
  store %14 to [trivial] %21 : $*Int              // id: %22
  // function_ref Range.init(uncheckedBounds:)
  %23 = function_ref @$sSn15uncheckedBoundsSnyxGx5lower_x5uppert_tcfC : $@convention(method) <τ_0_0 where τ_0_0 : Comparable> (@in τ_0_0, @in τ_0_0, @thin Range<τ_0_0>.Type) -> @out Range<τ_0_0> // user: %24
  %24 = apply %23<Int>(%9, %19, %21, %18) : $@convention(method) <τ_0_0 where τ_0_0 : Comparable> (@in τ_0_0, @in τ_0_0, @thin Range<τ_0_0>.Type) -> @out Range<τ_0_0>
  dealloc_stack %21 : $*Int                       // id: %25
  dealloc_stack %19 : $*Int                       // id: %26
  %27 = tuple ()
  %28 = load [trivial] %9 : $*Range<Int>          // user: %30
  %29 = alloc_stack $Range<Int>                   // users: %32, %34, %30
  store %28 to [trivial] %29 : $*Range<Int>       // id: %30
  // function_ref Collection<>.makeIterator()
  %31 = function_ref @$sSlss16IndexingIteratorVyxG0B0RtzrlE04makeB0ACyF : $@convention(method) <τ_0_0 where τ_0_0 : Collection, τ_0_0.Iterator == IndexingIterator<τ_0_0>> (@in τ_0_0) -> @out IndexingIterator<τ_0_0> // user: %32
  %32 = apply %31<Range<Int>>(%8, %29) : $@convention(method) <τ_0_0 where τ_0_0 : Collection, τ_0_0.Iterator == IndexingIterator<τ_0_0>> (@in τ_0_0) -> @out IndexingIterator<τ_0_0>
  %33 = tuple ()
  dealloc_stack %29 : $*Range<Int>                // id: %34
  dealloc_stack %9 : $*Range<Int>                 // id: %35
  br bb5                                          // id: %36


bb3:                                              // Preds: bb1
  br bb4                                          // id: %37


bb4:                                              // Preds: bb3
  br bb2                                          // id: %38


bb5:                                              // Preds: bb6 bb2
  %39 = alloc_stack $Optional<Int>                // users: %42, %46, %45
  %40 = begin_access [modify] [static] %8 : $*IndexingIterator<Range<Int>> // users: %42, %44
  // function_ref IndexingIterator.next()
  %41 = function_ref @$ss16IndexingIteratorV4next7ElementQzSgyF : $@convention(method) <τ_0_0 where τ_0_0 : Collection> (@inout IndexingIterator<τ_0_0>) -> @out Optional<τ_0_0.Element> // user: %42
  %42 = apply %41<Range<Int>>(%39, %40) : $@convention(method) <τ_0_0 where τ_0_0 : Collection> (@inout IndexingIterator<τ_0_0>) -> @out Optional<τ_0_0.Element>
  %43 = tuple ()
  end_access %40 : $*IndexingIterator<Range<Int>> // id: %44
  %45 = load [trivial] %39 : $*Optional<Int>      // user: %47
  dealloc_stack %39 : $*Optional<Int>             // id: %46
  switch_enum %45 : $Optional<Int>, case #Optional.some!enumelt.1: bb6, case #Optional.none!enumelt: bb7 // id: %47


bb6(%48 : $Int):                                  // Preds: bb5
  %49 = integer_literal $Builtin.Int64, 1         // user: %54
  %50 = begin_access [modify] [static] %4 : $*Int // users: %59, %51, %61
  %51 = struct_element_addr %50 : $*Int, #Int._value // user: %52
  %52 = load [trivial] %51 : $*Builtin.Int64      // user: %54
  %53 = integer_literal $Builtin.Int1, -1         // user: %54
  %54 = builtin "sadd_with_overflow_Int64"(%52 : $Builtin.Int64, %49 : $Builtin.Int64, %53 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1) // user: %55
  (%55, %56) = destructure_tuple %54 : $(Builtin.Int64, Builtin.Int1) // users: %58, %57
  cond_fail %56 : $Builtin.Int1, "arithmetic overflow" // id: %57
  %58 = struct $Int (%55 : $Builtin.Int64)        // user: %59
  store %58 to [trivial] %50 : $*Int              // id: %59
  %60 = tuple ()
  end_access %50 : $*Int                          // id: %61
  br bb5                                          // id: %62


bb7:                                              // Preds: bb5
  dealloc_stack %8 : $*IndexingIterator<Range<Int>> // id: %63
  %64 = begin_access [read] [static] %0 : $*Straducken // users: %67, %65
  %65 = struct_element_addr %64 : $*Straducken, #Straducken.anotherA // user: %66
  %66 = load [copy] %65 : $*Straducken.A          // user: %70
  end_access %64 : $*Straducken                   // id: %67
  %68 = begin_access [modify] [static] %0 : $*Straducken // users: %71, %69
  %69 = struct_element_addr %68 : $*Straducken, #Straducken.a // user: %70
  store %66 to [init] %69 : $*Straducken.A        // id: %70
  end_access %68 : $*Straducken                   // id: %71
  %72 = integer_literal $Builtin.Word, 0          // user: %74
  // function_ref _allocateUninitializedArray<A>(_:)
  %73 = function_ref @$ss27_allocateUninitializedArrayySayxG_BptBwlF : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // user: %74
  %74 = apply %73<Int>(%72) : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // user: %75
  (%75, %76) = destructure_tuple %74 : $(Array<Int>, Builtin.RawPointer) // users: %81, %77
  %77 = pointer_to_address %76 : $Builtin.RawPointer to [strict] $*Int
  %78 = begin_access [modify] [static] %0 : $*Straducken // users: %82, %79
  %79 = struct_element_addr %78 : $*Straducken, #Straducken.a // user: %80
  %80 = struct_element_addr %79 : $*Straducken.A, #Straducken.A.things // user: %81
  store %75 to [assign] %80 : $*Array<Int>        // id: %81
  end_access %78 : $*Straducken                   // id: %82
  dealloc_stack %4 : $*Int                        // id: %83
  %84 = tuple ()                                  // user: %85
  return %84 : $()                                // id: %85
} // end sil function '$s6delete10StraduckenV21moreOfAFunctionReallyyyF'


Stack dump:
0.  Program arguments: /Library/Developer/Toolchains/swift-tensorflow-DEVELOPMENT-2020-03-04-a.xctoolchain/usr/bin/swift -frontend -c /Users/porter/Dropbox (PassiveLogic)/Team/Team Members Scratch Space/Porter/Experiments/Playgrounds/delete/delete/main.swift -emit-module-path /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/delete.swiftmodule -emit-module-doc-path /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/delete.swiftdoc -emit-module-source-info-path /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/delete.swiftsourceinfo -serialize-diagnostics-path /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/delete-master.dia -emit-objc-header-path /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/delete-Swift.h -emit-dependencies-path /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/delete-master.d -target x86_64-apple-macos10.14 -enable-objc-interop -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -I /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Products/Release -F /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Products/Release -g -module-cache-path /Users/porter/Library/Developer/Xcode/DerivedData/ModuleCache.noindex -swift-version 5 -enforce-exclusivity=unchecked -O -remove-runtime-asserts -serialize-debugging-options -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/swift-overrides.hmap -Xcc -iquote -Xcc /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/delete-generated-files.hmap -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/delete-own-target-headers.hmap -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/delete-all-target-headers.hmap -Xcc -iquote -Xcc /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/delete-project-headers.hmap -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Products/Release/include -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/DerivedSources-normal/x86_64 -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/DerivedSources/x86_64 -Xcc -I/Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/DerivedSources -Xcc -working-directory/Users/porter/Dropbox (PassiveLogic)/Team/Team Members Scratch Space/Porter/Experiments/Playgrounds/delete -module-name delete -num-threads 4 -o /Users/porter/Library/Developer/Xcode/DerivedData/delete-cpxqlajexuodreakyfqhzwdmsbxl/Build/Intermediates.noindex/delete.build/Release/delete.build/Objects-normal/x86_64/main.o 
1.  Swift version 5.2-dev (LLVM b3057cffb6, Swift c8bea53782)
2.  While verifying SIL function "@$s6delete10StraduckenV21moreOfAFunctionReallyyyF".
 for 'moreOfAFunctionReally()' (at /Users/porter/Dropbox (PassiveLogic)/Team/Team Members Scratch Space/Porter/Experiments/Playgrounds/delete/delete/main.swift:18:14)
0  swift                    0x000000010c417e75 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 37
1  swift                    0x000000010c4170b5 llvm::sys::RunSignalHandlers() + 85
2  swift                    0x000000010c41845c SignalHandler(int) + 268
3  libsystem_platform.dylib 0x00007fff695ee42d _sigtramp + 29
4  swift                    0x000000010e667000 (anonymous namespace)::DarwinX86AsmBackend::getCompactUnwindRegNum(unsigned int) const::CU64BitRegs + 255826
5  libsystem_c.dylib        0x00007fff694c3a1c abort + 120
6  swift                    0x000000010c6fb1c7 MemoryLifetimeVerifier::require(bool, llvm::Twine const&, int, swift::SILInstruction*) (.cold.1) + 55
7  swift                    0x0000000108c19820 MemoryLifetimeVerifier::require(bool, llvm::Twine const&, int, swift::SILInstruction*) + 624
8  swift                    0x0000000108c19b27 MemoryLifetimeVerifier::requireBitsSet(llvm::SmallBitVector const&, swift::SILValue, swift::SILInstruction*) + 183
9  swift                    0x0000000108c1b3ac MemoryLifetimeVerifier::checkBlock(swift::SILBasicBlock*, llvm::SmallBitVector&) + 1132
10 swift                    0x0000000108c1a978 MemoryLifetimeVerifier::checkFunction(swift::MemoryDataflow&) + 1016
11 swift                    0x0000000108c1ba3c MemoryLifetimeVerifier::verify() + 172
12 swift                    0x0000000108c1bb77 swift::verifyMemoryLifetime(swift::SILFunction*) + 151
13 swift                    0x0000000108cd1f91 swift::SILFunction::verify(bool) const + 8817
14 swift                    0x0000000108cd55ba swift::SILModule::verify() const + 202
15 swift                    0x00000001083e671a swift::CompilerInstance::performSILProcessing(swift::SILModule*, swift::UnifiedStatsReporter*) + 138
16 swift                    0x000000010835a5a0 performCompileStepsPostSILGen(swift::CompilerInstance&, swift::CompilerInvocation const&, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule> >, bool, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::PrimarySpecificPaths const&, bool, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 1440
17 swift                    0x000000010834f363 performCompile(swift::CompilerInstance&, swift::CompilerInvocation const&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 9299
18 swift                    0x000000010834bf48 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 4472
19 swift                    0x00000001082de87d main + 861
20 libdyld.dylib            0x00007fff693f57fd start + 1
@dan-zheng
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This issue seems reproducible with https://swift.org/download development toolchains, so the issue isn't specific to Swift for TensorFlow.
Reproduced with https://swift.org/builds/development/xcode/swift-DEVELOPMENT-SNAPSHOT-2020-03-11-a/swift-DEVELOPMENT-SNAPSHOT-2020-03-11-a-osx.pkg.

Moving from TF to SR.

@beccadax
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@swift-ci create

@eeckstein
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fixed in #30731

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler itself
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@beccadax @dan-zheng @eeckstein @porterchild