Compiler crashes compiling expanded macro from a private import #84139
Description
Description
The following crashes the swift compiler:
Reproduction
// NB: swiftc only crashes if CasePaths is a private import
private import CasePaths
// Macro defined in CasePaths
@CasePathable
enum MyEnum {
case myCase
}Manually expanding the macro and inserting the code into the sample doesn't crash.
Full sample including Package.swift
Stack dump
Stack dump:
0. Program arguments: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -c -primary-file /Users/jnosh/Downloads/CompilerCrash/Sources/CompilerCrash/CompilerCrash.swift -emit-dependencies-path /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash.d -emit-const-values-path /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash.swiftconstvalues -emit-reference-dependencies-path /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash.swiftdeps -serialize-diagnostics-path /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash.dia -target arm64-apple-macos26.0 -load-resolved-plugin #/Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/CasePathsMacros#CasePathsMacros -load-resolved-plugin /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libFoundationMacros.dylib#/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server#FoundationMacros -load-resolved-plugin /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libObservationMacros.dylib#/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server#ObservationMacros -load-resolved-plugin /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libSwiftMacros.dylib#/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server#SwiftMacros -disable-implicit-swift-modules -Xcc -fno-implicit-modules -Xcc -fno-implicit-module-maps -explicit-swift-module-map-file /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash-dependencies-4.json -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX26.0.sdk -I /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug -Isystem /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/PackageFrameworks -F /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/PackageFrameworks -F /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/PackageFrameworks -F /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/PackageFrameworks -F /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/PackageFrameworks -F /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug -F /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -no-color-diagnostics -Xcc -fno-color-diagnostics -enable-testing -g -debug-info-format=dwarf -dwarf-version=5 -module-cache-path /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -swift-version 6 -enforce-exclusivity=checked -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -load-plugin-executable /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/CasePathsMacros#CasePathsMacros -const-gather-protocols-file /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash_const_extract_protocols.json -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -validate-clang-modules-once -clang-build-session-file /Users/jnosh/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/jnosh/Downloads/CompilerCrash/.swiftpm/xcode -enable-anonymous-context-mangled-names -file-compilation-dir /Users/jnosh/Downloads/CompilerCrash/.swiftpm/xcode -Xcc -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -ivfsstatcache -Xcc /Users/jnosh/Library/Developer/Xcode/DerivedData/SDKStatCaches.noindex/macosx26.0-25A5344a-28806144b0707e398aac92880fa50324.sdkstatcache -Xcc -I/Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/swift-overrides.hmap -Xcc -I/Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/include -Xcc -I/Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/DerivedSources-normal/arm64 -Xcc -I/Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/DerivedSources/arm64 -Xcc -I/Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG=1 -no-auto-bridging-header-chaining -module-name CompilerCrash -package-name compilercrash -frontend-parseable-output -disable-clang-spi -target-sdk-version 26.0 -target-sdk-name macosx26.0 -clang-target arm64-apple-macos26.0 -in-process-plugin-server-path /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -parse-as-library -o /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash.o -index-unit-output-path /CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash.o -index-store-path /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Index.noindex/DataStore -index-system-modules
1. Apple Swift version 6.2 (swiftlang-6.2.0.19.9 clang-1700.3.19.1)
2. Compiling with the current language version
3. While evaluating request ASTLoweringRequest(Lowering AST to SIL for file "/Users/jnosh/Downloads/CompilerCrash/Sources/CompilerCrash/CompilerCrash.swift")
4. While silgen emitFunction SIL function "@$s13CompilerCrash6MyEnumO12AllCasePathsVys14PartialKeyPathCy0fG4Core0F0VyACGGACcig".
for getter for subscript(_:) (at @__swiftmacro_13CompilerCrash6MyEnum12CasePathablefMm_.swift:2:12)
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 0x000000010ae55bcc llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56
1 swift-frontend 0x000000010ae5355c llvm::sys::RunSignalHandlers() + 112
2 swift-frontend 0x000000010ae561f8 SignalHandler(int, __siginfo*, void*) + 344
3 libsystem_platform.dylib 0x0000000191e84704 _sigtramp + 56
4 swift-frontend 0x0000000105598fc4 swift::Lowering::SILGenFunction::emitApplyExpr(swift::ApplyExpr*, swift::Lowering::SGFContext) + 524
5 swift-frontend 0x00000001055f86d4 swift::Lowering::SILGenFunction::emitStmtCondition(llvm::MutableArrayRef<swift::StmtConditionElement>, swift::Lowering::JumpDest, swift::SILLocation, swift::ProfileCounter, swift::ProfileCounter) + 224
6 swift-frontend 0x00000001056d0620 swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 9900
7 swift-frontend 0x00000001056cf7cc swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 6232
8 swift-frontend 0x00000001056475ac swift::Lowering::SILGenFunction::emitFunction(swift::FuncDecl*) + 384
9 swift-frontend 0x00000001055826ac swift::Lowering::SILGenModule::emitFunctionDefinition(swift::SILDeclRef, swift::SILFunction*) + 7596
10 swift-frontend 0x00000001055836f0 swift::Lowering::SILGenModule::emitOrDelayFunction(swift::SILDeclRef) + 236
11 swift-frontend 0x00000001055808ec swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*) + 136
12 swift-frontend 0x00000001056ea668 (anonymous namespace)::SILGenType::visitFuncDecl(swift::FuncDecl*) + 32
13 swift-frontend 0x00000001056ea868 (anonymous namespace)::SILGenType::visitAbstractStorageDecl(swift::AbstractStorageDecl*) + 248
14 swift-frontend 0x00000001056e648c (anonymous namespace)::SILGenType::emitType() + 488
15 swift-frontend 0x00000001056e645c (anonymous namespace)::SILGenType::emitType() + 440
16 swift-frontend 0x0000000105580600 swift::ASTVisitor<swift::Lowering::SILGenModule, void, void, void, void, void, void>::visit(swift::Decl*) + 100
17 swift-frontend 0x0000000105587538 swift::ASTLoweringRequest::evaluate(swift::Evaluator&, swift::ASTLoweringDescriptor) const + 2364
18 swift-frontend 0x00000001056cd61c swift::SimpleRequest<swift::ASTLoweringRequest, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule>> (swift::ASTLoweringDescriptor), (swift::RequestFlags)17>::evaluateRequest(swift::ASTLoweringRequest const&, swift::Evaluator&) + 208
19 swift-frontend 0x000000010558bfc0 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'()) + 572
20 swift-frontend 0x0000000104a8f708 swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 964
21 swift-frontend 0x0000000104a92a7c performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 1764
22 swift-frontend 0x0000000104a9168c swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 3580
23 swift-frontend 0x0000000104a12c6c swift::mainEntry(int, char const**) + 5412
24 dyld 0x0000000191abd924 start + 6400
Failed frontend command:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -c -primary-file /Users/jnosh/Downloads/CompilerCrash/Sources/CompilerCrash/CompilerCrash.swift -emit-dependencies-path /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash.d -emit-const-values-path /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash.swiftconstvalues -emit-reference-dependencies-path /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash.swiftdeps -serialize-diagnostics-path /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash.dia -target arm64-apple-macos26.0 -load-resolved-plugin \#/Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/CasePathsMacros\#CasePathsMacros -load-resolved-plugin /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libFoundationMacros.dylib\#/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#FoundationMacros -load-resolved-plugin /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libObservationMacros.dylib\#/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#ObservationMacros -load-resolved-plugin /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libSwiftMacros.dylib\#/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#SwiftMacros -disable-implicit-swift-modules -Xcc -fno-implicit-modules -Xcc -fno-implicit-module-maps -explicit-swift-module-map-file /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash-dependencies-4.json -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX26.0.sdk -I /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug -Isystem /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/PackageFrameworks -F /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/PackageFrameworks -F /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/PackageFrameworks -F /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/PackageFrameworks -F /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/PackageFrameworks -F /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug -F /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -no-color-diagnostics -Xcc -fno-color-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=5 -module-cache-path /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -swift-version 6 -enforce-exclusivity\=checked -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -load-plugin-executable /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/CasePathsMacros\#CasePathsMacros -const-gather-protocols-file /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash_const_extract_protocols.json -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -validate-clang-modules-once -clang-build-session-file /Users/jnosh/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/jnosh/Downloads/CompilerCrash/.swiftpm/xcode -enable-anonymous-context-mangled-names -file-compilation-dir /Users/jnosh/Downloads/CompilerCrash/.swiftpm/xcode -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -ivfsstatcache -Xcc /Users/jnosh/Library/Developer/Xcode/DerivedData/SDKStatCaches.noindex/macosx26.0-25A5344a-28806144b0707e398aac92880fa50324.sdkstatcache -Xcc -I/Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/swift-overrides.hmap -Xcc -I/Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Products/Debug/include -Xcc -I/Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/DerivedSources-normal/arm64 -Xcc -I/Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/DerivedSources/arm64 -Xcc -I/Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name CompilerCrash -package-name compilercrash -frontend-parseable-output -disable-clang-spi -target-sdk-version 26.0 -target-sdk-name macosx26.0 -clang-target arm64-apple-macos26.0 -in-process-plugin-server-path /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -parse-as-library -o /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Build/Intermediates.noindex/CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash.o -index-unit-output-path /CompilerCrash.build/Debug/CompilerCrash.build/Objects-normal/arm64/CompilerCrash.o -index-store-path /Users/jnosh/Library/Developer/Xcode/DerivedData/CompilerCrash-bmbyzusfhqwtzjayxjdfsudsaouj/Index.noindex/DataStore -index-system-modules
Expected behavior
The compiler should not crash.
Environment
Xcode 26.0 beta 7 (17A5305k)
swift-driver version: 1.127.14.1 Apple Swift version 6.2 (swiftlang-6.2.0.19.9 clang-1700.3.19.1)
Additional information
No response