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[SR-13179] SourceKit crashes in ModuleFile::lookupClassMembers on SwiftPM file with incomplete code #55620

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belkadan opened this issue Jul 8, 2020 · 0 comments
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@belkadan belkadan commented Jul 8, 2020

Previous ID SR-13179
Radar None
Original Reporter @belkadan
Type Bug

Attachment: Download

Additional Detail from JIRA
Votes 0
Component/s Source Tooling
Labels Bug
Assignee None
Priority Medium

md5: 8ad80d500b26604a1e962e437c9b79af

Issue Description:

Steps to reproduce:

  1. Open the attached package in Xcode 12b1.

  2. Build the "Suffusion" target.

  3. Switch to the "mount_json" target.

  4. Open Sources/mount_json/main.swift

  5. Add a space to the end of line 28 (just after takeUnretainedValue()). Invoke code completion if nothing seems to be happening.

This is almost certainly a compiler bug given the backtrace, but it doesn't happen in builds, probably because there's no actual call to lookupClassMembers there.

4 com.apple.SourceKitService.1200.0.16.13_osx 0x000000010a77bdfc swift::ModuleFile::fatal(llvm::Error) + 23484 com.apple.SourceKitService.1200.0.16.13_osx 0x000000010a77bdfc swift::ModuleFile::fatal(llvm::Error) + 23485 com.apple.SourceKitService.1200.0.16.13_osx 0x000000010a7db480 swift::ModuleFile::lookupClassMembers(llvm::ArrayRef<swift::Located<swift::Identifier> >, swift::VisibleDeclConsumer&) + 16486 com.apple.SourceKitService.1200.0.16.13_osx 0x000000010ab8c5ad swift::ModuleDecl::lookupClassMembers(llvm::ArrayRef<swift::Located<swift::Identifier> >, swift::VisibleDeclConsumer&) const + 777 com.apple.SourceKitService.1200.0.16.13_osx 0x000000010a5e16e3 lookupVisibleMemberDeclsImpl(swift::Type, swift::VisibleDeclConsumer&, swift::DeclContext const*, (anonymous namespace)::LookupState, swift::DeclVisibilityKind, swift::GenericSignatureBuilder*, llvm::SmallPtrSet<swift::TypeDecl*, 8u>&) + 8838 com.apple.SourceKitService.1200.0.16.13_osx 0x000000010a5dfe51 lookupVisibleMemberAndDynamicMemberDecls(swift::Type, swift::VisibleDeclConsumer&, (anonymous namespace)::KeyPathDynamicMemberConsumer&, swift::DeclContext const*, (anonymous namespace)::LookupState, swift::DeclVisibilityKind, swift::GenericSignatureBuilder*, llvm::SmallPtrSet<swift::TypeDecl*, 8u>&, llvm::DenseSet<swift::TypeBase*, llvm::DenseMapInfo<swift::TypeBase*> >&) + 65

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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