[compiler] Reproducible crash: headbutt between callAsFunction and parameter packs?

[GarthSnyder]

Description

The code below crashes the compiler.

Here's the backtrace

Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the crash backtrace.
Stack dump:
0.	Program arguments: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -c -primary-file /Users/garth/Work/Playgrounds/CountOnes/CountOnes/main.swift -emit-dependencies-path /Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/Objects-normal/arm64/main.d -emit-const-values-path /Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/Objects-normal/arm64/main.swiftconstvalues -emit-reference-dependencies-path /Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/Objects-normal/arm64/main.swiftdeps -serialize-diagnostics-path /Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/Objects-normal/arm64/main.dia -target arm64-apple-macos15.2 -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.2.sdk -I /Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Products/Debug -F /Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Products/Debug -no-color-diagnostics -enable-testing -g -debug-info-format=dwarf -dwarf-version=5 -module-cache-path /Users/garth/Library/Developer/Xcode/DerivedData/ModuleCache.noindex -swift-version 6 -enforce-exclusivity=checked -Onone -D DEBUG -serialize-debugging-options -const-gather-protocols-file /Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/Objects-normal/arm64/CountOnes_const_extract_protocols.json -enable-experimental-feature DebugDescriptionMacro -enable-experimental-feature OpaqueTypeErasure -empty-abi-descriptor -validate-clang-modules-once -clang-build-session-file /Users/garth/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/garth/Work/Playgrounds/CountOnes -resource-dir /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift -enable-anonymous-context-mangled-names -file-compilation-dir /Users/garth/Work/Playgrounds/CountOnes -Xcc -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -ivfsstatcache -Xcc /Users/garth/Library/Developer/Xcode/DerivedData/SDKStatCaches.noindex/macosx15.2-24C94-1dd28740b163f220e3e9b9fd2a542f53.sdkstatcache -Xcc -I/Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/swift-overrides.hmap -Xcc -iquote -Xcc /Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/CountOnes-generated-files.hmap -Xcc -I/Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/CountOnes-own-target-headers.hmap -Xcc -I/Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/CountOnes-all-target-headers.hmap -Xcc -iquote -Xcc /Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/CountOnes-project-headers.hmap -Xcc -I/Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Products/Debug/include -Xcc -I/Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/DerivedSources-normal/arm64 -Xcc -I/Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/DerivedSources/arm64 -Xcc -I/Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/DerivedSources -Xcc -DDEBUG=1 -module-name CountOnes -frontend-parseable-output -disable-clang-spi -target-sdk-version 15.2 -target-sdk-name macosx15.2 -external-plugin-path /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins#/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/local/lib/swift/host/plugins#/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -plugin-path /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins -plugin-path /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/local/lib/swift/host/plugins -o /Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Build/Intermediates.noindex/CountOnes.build/Debug/CountOnes.build/Objects-normal/arm64/main.o -index-unit-output-path /CountOnes.build/Debug/CountOnes.build/Objects-normal/arm64/main.o -index-store-path /Users/garth/Library/Developer/Xcode/DerivedData/CountOnes-dhgmkxrmzfqlwdhgdleunjujyglm/Index.noindex/DataStore -index-system-modules
1.	Apple Swift version 6.0.3 (swiftlang-6.0.3.1.10 clang-1600.0.30.1)
2.	Compiling with the current language version
3.	While evaluating request ASTLoweringRequest(Lowering AST to SIL for file "/Users/garth/Work/Playgrounds/CountOnes/CountOnes/main.swift")
4.	While silgen emitFunction SIL function "@$s9CountOnes7MemoizeC14callAsFunctionyq_xxQpF".
 for 'callAsFunction(_:)' (at /Users/garth/Work/Playgrounds/CountOnes/CountOnes/main.swift:34:5)
5.	While silgen closureexpr SIL function "@$s9CountOnes7MemoizeC14callAsFunctionyq_xxQpFq_xxQpcACyxxQp_QPq_Gcfu_".
 for expression at [/Users/garth/Work/Playgrounds/CountOnes/CountOnes/main.swift:39:29 - line:39:29] RangeText=""
6.	While silgen closureexpr SIL function "@$s9CountOnes7MemoizeC14callAsFunctionyq_xxQpFq_xxQpcACyxxQp_QPq_Gcfu_q_xxQpcfu0_".
 for expression at [/Users/garth/Work/Playgrounds/CountOnes/CountOnes/main.swift:39:29 - line:39:29] RangeText=""
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0  swift-frontend           0x000000010a606a9c llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56
1  swift-frontend           0x000000010a604cf0 llvm::sys::RunSignalHandlers() + 112
2  swift-frontend           0x000000010a607068 SignalHandler(int) + 292
3  libsystem_platform.dylib 0x0000000190aeee04 _sigtramp + 56
4  swift-frontend           0x00000001059f0918 void llvm::function_ref<void (swift::SILValue, swift::SILValue, swift::SILValue)>::callback_fn<(anonymous namespace)::ArgEmitter::emitPackExpansionIntoPack(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern, swift::SILType, bool, swift::SILValue, swift::CanTypeWrapper<swift::PackType>, unsigned int)::'lambda'(swift::SILValue, swift::SILValue, swift::SILValue)>(long, swift::SILValue, swift::SILValue, swift::SILValue) + 484
5  swift-frontend           0x00000001059f0918 void llvm::function_ref<void (swift::SILValue, swift::SILValue, swift::SILValue)>::callback_fn<(anonymous namespace)::ArgEmitter::emitPackExpansionIntoPack(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern, swift::SILType, bool, swift::SILValue, swift::CanTypeWrapper<swift::PackType>, unsigned int)::'lambda'(swift::SILValue, swift::SILValue, swift::SILValue)>(long, swift::SILValue, swift::SILValue, swift::SILValue) + 484
6  swift-frontend           0x0000000105ac2494 swift::Lowering::SILGenFunction::emitDynamicPackLoop(swift::SILLocation, swift::CanTypeWrapper<swift::PackType>, unsigned int, swift::SILValue, swift::SILValue, swift::GenericEnvironment*, bool, llvm::function_ref<void (swift::SILValue, swift::SILValue, swift::SILValue)>, swift::SILBasicBlock*) + 1448
7  swift-frontend           0x00000001059efc38 (anonymous namespace)::ArgEmitter::emitPackArg(llvm::MutableArrayRef<swift::Lowering::ArgumentSource>, swift::Lowering::AbstractionPattern) + 3676
8  swift-frontend           0x00000001059ecaa8 (anonymous namespace)::ArgEmitter::emitPreparedArgs(swift::Lowering::PreparedArguments&&, swift::Lowering::AbstractionPattern) + 508
9  swift-frontend           0x00000001059f8878 (anonymous namespace)::CallSite::emit(swift::Lowering::SILGenFunction&, swift::Lowering::AbstractionPattern, swift::CanTypeWrapper<swift::SILFunctionType>, (anonymous namespace)::ParamLowering&, llvm::SmallVectorImpl<swift::Lowering::ManagedValue>&, llvm::SmallVectorImpl<(anonymous namespace)::DelayedArgument>&, swift::ForeignInfo const&) && + 664
10 swift-frontend           0x00000001059f8298 (anonymous namespace)::CallEmission::emitArgumentsForNormalApply(swift::Lowering::AbstractionPattern, swift::CanTypeWrapper<swift::SILFunctionType>, swift::ForeignInfo const&, llvm::SmallVectorImpl<swift::Lowering::ManagedValue>&, std::__1::optional<swift::SILLocation>&) + 1000
11 swift-frontend           0x00000001059e0e7c (anonymous namespace)::CallEmission::apply(swift::Lowering::SGFContext) + 2028
12 swift-frontend           0x00000001059df408 swift::Lowering::SILGenFunction::emitApplyExpr(swift::ApplyExpr*, swift::Lowering::SGFContext) + 3116
13 swift-frontend           0x0000000105a4c37c swift::Lowering::SILGenFunction::emitExprInto(swift::Expr*, swift::Lowering::Initialization*, std::__1::optional<swift::SILLocation>) + 128
14 swift-frontend           0x0000000105b0a704 swift::Lowering::SILGenFunction::emitReturnExpr(swift::SILLocation, swift::Expr*) + 1024
15 swift-frontend           0x0000000105a7f398 swift::Lowering::SILGenFunction::emitClosure(swift::AbstractClosureExpr*) + 888
16 swift-frontend           0x00000001059c9b10 swift::Lowering::SILGenModule::emitFunctionDefinition(swift::SILDeclRef, swift::SILFunction*) + 4312
17 swift-frontend           0x00000001059d370c void llvm::function_ref<void ()>::callback_fn<swift::Lowering::SILGenModule::emitClosure(swift::AbstractClosureExpr*, swift::Lowering::FunctionTypeInfo const&)::$_0>(long) + 200
18 swift-frontend           0x00000001059cc810 swift::Lowering::SILGenModule::emitClosure(swift::AbstractClosureExpr*, swift::Lowering::FunctionTypeInfo const&) + 280
19 swift-frontend           0x0000000105a73b30 (anonymous namespace)::RValueEmitter::visitAbstractClosureExpr(swift::AbstractClosureExpr*, swift::Lowering::SGFContext) + 2948
20 swift-frontend           0x0000000105b0a61c swift::Lowering::SILGenFunction::emitReturnExpr(swift::SILLocation, swift::Expr*) + 792
21 swift-frontend           0x0000000105a7f398 swift::Lowering::SILGenFunction::emitClosure(swift::AbstractClosureExpr*) + 888
22 swift-frontend           0x00000001059c9b10 swift::Lowering::SILGenModule::emitFunctionDefinition(swift::SILDeclRef, swift::SILFunction*) + 4312
23 swift-frontend           0x00000001059d370c void llvm::function_ref<void ()>::callback_fn<swift::Lowering::SILGenModule::emitClosure(swift::AbstractClosureExpr*, swift::Lowering::FunctionTypeInfo const&)::$_0>(long) + 200
24 swift-frontend           0x00000001059cc810 swift::Lowering::SILGenModule::emitClosure(swift::AbstractClosureExpr*, swift::Lowering::FunctionTypeInfo const&) + 280
25 swift-frontend           0x00000001059f69cc (anonymous namespace)::SILGenApply::visitAbstractClosureExpr(swift::AbstractClosureExpr*) + 104
26 swift-frontend           0x00000001059de93c swift::Lowering::SILGenFunction::emitApplyExpr(swift::ApplyExpr*, swift::Lowering::SGFContext) + 352
27 swift-frontend           0x0000000105a671c0 (anonymous namespace)::RValueEmitter::visitFunctionConversionExpr(swift::FunctionConversionExpr*, swift::Lowering::SGFContext) + 3528
28 swift-frontend           0x0000000105a4f58c swift::Lowering::SILGenFunction::emitRValueAsSingleValue(swift::Expr*, swift::Lowering::SGFContext) + 40
29 swift-frontend           0x00000001059ee068 (anonymous namespace)::ArgEmitter::emit(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern, std::__1::optional<swift::AnyFunctionType::Param>) + 5028
30 swift-frontend           0x00000001059dc0f0 (anonymous namespace)::ArgEmitter::emitSingleArg(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern, std::__1::optional<swift::AnyFunctionType::Param>) + 216
31 swift-frontend           0x00000001059ec9ac (anonymous namespace)::ArgEmitter::emitPreparedArgs(swift::Lowering::PreparedArguments&&, swift::Lowering::AbstractionPattern) + 256
32 swift-frontend           0x00000001059f8878 (anonymous namespace)::CallSite::emit(swift::Lowering::SILGenFunction&, swift::Lowering::AbstractionPattern, swift::CanTypeWrapper<swift::SILFunctionType>, (anonymous namespace)::ParamLowering&, llvm::SmallVectorImpl<swift::Lowering::ManagedValue>&, llvm::SmallVectorImpl<(anonymous namespace)::DelayedArgument>&, swift::ForeignInfo const&) && + 664
33 swift-frontend           0x00000001059f8298 (anonymous namespace)::CallEmission::emitArgumentsForNormalApply(swift::Lowering::AbstractionPattern, swift::CanTypeWrapper<swift::SILFunctionType>, swift::ForeignInfo const&, llvm::SmallVectorImpl<swift::Lowering::ManagedValue>&, std::__1::optional<swift::SILLocation>&) + 1000
34 swift-frontend           0x00000001059e0e7c (anonymous namespace)::CallEmission::apply(swift::Lowering::SGFContext) + 2028
35 swift-frontend           0x00000001059df408 swift::Lowering::SILGenFunction::emitApplyExpr(swift::ApplyExpr*, swift::Lowering::SGFContext) + 3116
36 swift-frontend           0x0000000105a4c37c swift::Lowering::SILGenFunction::emitExprInto(swift::Expr*, swift::Lowering::Initialization*, std::__1::optional<swift::SILLocation>) + 128
37 swift-frontend           0x0000000105a3790c swift::Lowering::SILGenFunction::emitPatternBinding(swift::PatternBindingDecl*, unsigned int, bool) + 2016
38 swift-frontend           0x0000000105a3e840 swift::ASTVisitor<swift::Lowering::SILGenFunction, void, void, void, void, void, void>::visit(swift::Decl*) + 140
39 swift-frontend           0x0000000105b07368 swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 5756
40 swift-frontend           0x0000000105a7efc8 swift::Lowering::SILGenFunction::emitFunction(swift::FuncDecl*) + 492
41 swift-frontend           0x00000001059cab1c swift::Lowering::SILGenModule::emitFunctionDefinition(swift::SILDeclRef, swift::SILFunction*) + 8420
42 swift-frontend           0x00000001059cb3bc swift::Lowering::SILGenModule::emitOrDelayFunction(swift::SILDeclRef) + 216
43 swift-frontend           0x00000001059c89ec swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*) + 364
44 swift-frontend           0x0000000105b1ec8c (anonymous namespace)::SILGenType::visitFuncDecl(swift::FuncDecl*) + 32
45 swift-frontend           0x0000000105b1b234 (anonymous namespace)::SILGenType::emitType() + 424
46 swift-frontend           0x00000001059c8624 swift::ASTVisitor<swift::Lowering::SILGenModule, void, void, void, void, void, void>::visit(swift::Decl*) + 104
47 swift-frontend           0x00000001059cf038 swift::ASTLoweringRequest::evaluate(swift::Evaluator&, swift::ASTLoweringDescriptor) const + 1804
48 swift-frontend           0x0000000105b0592c swift::SimpleRequest<swift::ASTLoweringRequest, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule>> (swift::ASTLoweringDescriptor), (swift::RequestFlags)9>::evaluateRequest(swift::ASTLoweringRequest const&, swift::Evaluator&) + 196
49 swift-frontend           0x00000001059d3f14 swift::ASTLoweringRequest::OutputType swift::Evaluator::getResultUncached<swift::ASTLoweringRequest, swift::ASTLoweringRequest::OutputType swift::evaluateOrFatal<swift::ASTLoweringRequest>(swift::Evaluator&, swift::ASTLoweringRequest)::'lambda'()>(swift::ASTLoweringRequest const&, swift::ASTLoweringRequest::OutputType swift::evaluateOrFatal<swift::ASTLoweringRequest>(swift::Evaluator&, swift::ASTLoweringRequest)::'lambda'()) + 528
50 swift-frontend           0x0000000104fadb90 swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 920
51 swift-frontend           0x0000000104fb0e88 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 1684
52 swift-frontend           0x0000000104fafbb4 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 3572
53 swift-frontend           0x0000000104f36a5c swift::mainEntry(int, char const**) + 3680
54 dyld                     0x0000000190738274 start + 2840
Command SwiftCompile failed with a nonzero exit code

Reproduction

final class Memoize<each A: Hashable, R> {
    typealias BaseFunction = ((repeat each A) -> R, repeat each A) -> R
    let f: BaseFunction
    init(_ f: @escaping BaseFunction) {
        self.f = f
    }
    func callAsFunction(_ argument: repeat each A) -> R {
        let result = f(self.callAsFunction, repeat each argument)
        return result
    }
}

Expected behavior

No crash

Environment

swift-driver version: 1.115.1 Apple Swift version 6.0.3 (swiftlang-6.0.3.1.10 clang-1600.0.30.1)
Target: arm64-apple-macosx15.0
Swift 6 language mode, but also happens on 5.10

Additional information

No response