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c20f2fe022
Add test case for crash triggered in `swift::ProtocolConformance::getTypeWitnessSubstAndDecl`. Current number of unresolved compiler crashers: 136 (5233 resolved) Assertion failure in [`lib/AST/ProtocolConformance.cpp (line 298)`](https://github.com/apple/swift/blob/master/lib/AST/ProtocolConformance.cpp#L298): ``` Assertion `known != TypeWitnesses.end() && "Didn't resolve witness?"' failed. When executing: std::pair<const Substitution &, TypeDecl *> swift::NormalProtocolConformance::getTypeWitnessSubstAndDecl(swift::AssociatedTypeDecl *, swift::LazyResolver *) const ``` Assertion context: ``` auto known = TypeWitnesses.find(assocType); if (known == TypeWitnesses.end()) { assert(resolver && "Unable to resolve type witness"); resolver->resolveTypeWitness(this, assocType); known = TypeWitnesses.find(assocType); assert(known != TypeWitnesses.end() && "Didn't resolve witness?"); } return known->second; } ``` Stack trace: ``` 0 0x000000000348edb8 llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/path/to/swift/bin/swift+0x348edb8) 1 0x000000000348f4f6 SignalHandler(int) (/path/to/swift/bin/swift+0x348f4f6) 2 0x00007f48ce8d53e0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x113e0) 3 0x00007f48cd003428 gsignal /build/glibc-Qz8a69/glibc-2.23/signal/../sysdeps/unix/sysv/linux/raise.c:54:0 4 0x00007f48cd00502a abort /build/glibc-Qz8a69/glibc-2.23/stdlib/abort.c:91:0 5 0x00007f48ccffbbd7 __assert_fail_base /build/glibc-Qz8a69/glibc-2.23/assert/assert.c:92:0 6 0x00007f48ccffbc82 (/lib/x86_64-linux-gnu/libc.so.6+0x2dc82) 7 0x0000000000e2a6e7 (/path/to/swift/bin/swift+0xe2a6e7) 8 0x0000000000e2a506 swift::ProtocolConformance::getTypeWitnessSubstAndDecl(swift::AssociatedTypeDecl*, swift::LazyResolver*) const (/path/to/swift/bin/swift+0xe2a506) 9 0x0000000000c1c4a4 (anonymous namespace)::LookupResultBuilder::add(swift::ValueDecl*, swift::ValueDecl*, swift::Type) (/path/to/swift/bin/swift+0xc1c4a4) 10 0x0000000000c1c034 swift::TypeChecker::lookupUnqualified(swift::DeclContext*, swift::DeclName, swift::SourceLoc, swift::OptionSet<swift::NameLookupFlags, unsigned int>) (/path/to/swift/bin/swift+0xc1c034) 11 0x0000000000bd391f swift::TypeChecker::resolveDeclRefExpr(swift::UnresolvedDeclRefExpr*, swift::DeclContext*) (/path/to/swift/bin/swift+0xbd391f) 12 0x0000000000be00bf (anonymous namespace)::PreCheckExpression::walkToExprPre(swift::Expr*) (/path/to/swift/bin/swift+0xbe00bf) 13 0x0000000000dbb48b swift::Expr::walk(swift::ASTWalker&) (/path/to/swift/bin/swift+0xdbb48b) 14 0x0000000000bd52c5 swift::TypeChecker::solveForExpression(swift::Expr*&, swift::DeclContext*, swift::Type, swift::FreeTypeVariableBinding, swift::ExprTypeCheckListener*, swift::constraints::ConstraintSystem&, llvm::SmallVectorImpl<swift::constraints::Solution>&, swift::OptionSet<swift::TypeCheckExprFlags, unsigned int>) (/path/to/swift/bin/swift+0xbd52c5) 15 0x0000000000bd89a9 swift::TypeChecker::typeCheckExpression(swift::Expr*&, swift::DeclContext*, swift::TypeLoc, swift::ContextualTypePurpose, swift::OptionSet<swift::TypeCheckExprFlags, unsigned int>, swift::ExprTypeCheckListener*, swift::constraints::ConstraintSystem*) (/path/to/swift/bin/swift+0xbd89a9) 16 0x0000000000bdc786 swift::TypeChecker::typeCheckBinding(swift::Pattern*&, swift::Expr*&, swift::DeclContext*) (/path/to/swift/bin/swift+0xbdc786) 17 0x0000000000bdc93f swift::TypeChecker::typeCheckPatternBinding(swift::PatternBindingDecl*, unsigned int) (/path/to/swift/bin/swift+0xbdc93f) 18 0x0000000000bf21bc validatePatternBindingDecl(swift::TypeChecker&, swift::PatternBindingDecl*, unsigned int) (/path/to/swift/bin/swift+0xbf21bc) 19 0x0000000000bee27d (anonymous namespace)::DeclChecker::visit(swift::Decl*) (/path/to/swift/bin/swift+0xbee27d) 20 0x0000000000bfbfcb (anonymous namespace)::DeclChecker::visitEnumDecl(swift::EnumDecl*) (/path/to/swift/bin/swift+0xbfbfcb) 21 0x0000000000bee23b (anonymous namespace)::DeclChecker::visit(swift::Decl*) (/path/to/swift/bin/swift+0xbee23b) 22 0x0000000000bfd06b (anonymous namespace)::DeclChecker::visitProtocolDecl(swift::ProtocolDecl*) (/path/to/swift/bin/swift+0xbfd06b) 23 0x0000000000bee31a (anonymous namespace)::DeclChecker::visit(swift::Decl*) (/path/to/swift/bin/swift+0xbee31a) 24 0x0000000000bee14d swift::TypeChecker::typeCheckDecl(swift::Decl*, bool) (/path/to/swift/bin/swift+0xbee14d) 25 0x0000000000c603f2 swift::performTypeChecking(swift::SourceFile&, swift::TopLevelContext&, swift::OptionSet<swift::TypeCheckingFlags, unsigned int>, unsigned int, unsigned int) (/path/to/swift/bin/swift+0xc603f2) 26 0x00000000009808a6 swift::CompilerInstance::performSema() (/path/to/swift/bin/swift+0x9808a6) 27 0x000000000047d3e6 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*) (/path/to/swift/bin/swift+0x47d3e6) 28 0x000000000047c2ec swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/path/to/swift/bin/swift+0x47c2ec) 29 0x000000000043ac17 main (/path/to/swift/bin/swift+0x43ac17) 30 0x00007f48ccfee830 __libc_start_main /build/glibc-Qz8a69/glibc-2.23/csu/../csu/libc-start.c:325:0 31 0x0000000000438059 _start (/path/to/swift/bin/swift+0x438059) ```
// This source file is part of the Swift.org open source project // Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors // Licensed under Apache License v2.0 with Runtime Library Exception // // See https://swift.org/LICENSE.txt for license information // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors Repository: https://github.com/practicalswift/swift-compiler-crashes.git Web URL: https://github.com/practicalswift/swift-compiler-crashes