[swiftc] Add test case for crash triggered in swift::Expr::walk(…) #1669
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…::ASTWalker&) Stack trace: ``` swift: /path/to/swift/lib/Sema/CSApply.cpp:147: swift::Type swift::constraints::Solution::computeSubstitutions(swift::Type, swift::DeclContext *, swift::Type, swift::constraints::ConstraintLocator *, SmallVectorImpl<swift::Substitution> &) const: Assertion `(conforms || firstArchetype->getIsRecursive() || isOpenedAnyObject(replacement) || replacement->is<GenericTypeParamType>()) && "Constraint system missed a conformance?"' failed. 12 swift 0x0000000000fde105 swift::Expr::walk(swift::ASTWalker&) + 69 13 swift 0x0000000000ed2786 swift::constraints::ConstraintSystem::applySolution(swift::constraints::Solution&, swift::Expr*, swift::Type, bool, bool, bool) + 502 14 swift 0x0000000000e3548a swift::TypeChecker::typeCheckExpression(swift::Expr*&, swift::DeclContext*, swift::Type, swift::ContextualTypePurpose, swift::OptionSet<swift::TypeCheckExprFlags, unsigned int>, swift::ExprTypeCheckListener*) + 746 16 swift 0x0000000000eec723 swift::constraints::ConstraintSystem::diagnoseFailureForExpr(swift::Expr*) + 179 17 swift 0x0000000000ef11b0 swift::constraints::ConstraintSystem::salvage(llvm::SmallVectorImpl<swift::constraints::Solution>&, swift::Expr*) + 4064 18 swift 0x0000000000e2ef33 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>) + 787 19 swift 0x0000000000e353e0 swift::TypeChecker::typeCheckExpression(swift::Expr*&, swift::DeclContext*, swift::Type, swift::ContextualTypePurpose, swift::OptionSet<swift::TypeCheckExprFlags, unsigned int>, swift::ExprTypeCheckListener*) + 576 23 swift 0x0000000000ea5a5a swift::TypeChecker::typeCheckFunctionBodyUntil(swift::FuncDecl*, swift::SourceLoc) + 346 24 swift 0x0000000000ea58be swift::TypeChecker::typeCheckAbstractFunctionBodyUntil(swift::AbstractFunctionDecl*, swift::SourceLoc) + 46 25 swift 0x0000000000ea6458 swift::TypeChecker::typeCheckAbstractFunctionBody(swift::AbstractFunctionDecl*) + 136 27 swift 0x0000000000e6a9f4 swift::performTypeChecking(swift::SourceFile&, swift::TopLevelContext&, swift::OptionSet<swift::TypeCheckingFlags, unsigned int>, unsigned int) + 1300 28 swift 0x0000000000cbcedf swift::CompilerInstance::performSema() + 3087 30 swift 0x000000000078b6ff frontend_main(llvm::ArrayRef<char const*>, char const*, void*) + 2495 31 swift 0x00000000007861c5 main + 2837 Stack dump: 0. Program arguments: /path/to/swift/bin/swift -frontend -c -primary-file validation-test/compiler_crashers/28269-swift-expr-walk.swift -target x86_64-unknown-linux-gnu -disable-objc-interop -module-name main -o /tmp/28269-swift-expr-walk-5303a6.o 1. While type-checking getter for t at validation-test/compiler_crashers/28269-swift-expr-walk.swift:10:46 2. While type-checking expression at [<invalid loc> - <invalid loc>] 3. While type-checking expression at [<invalid loc> - <invalid loc>] <unknown>:0: error: unable to execute command: Aborted <unknown>:0: error: compile command failed due to signal (use -v to see invocation) ```
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…walk [swiftc] Add test case for crash triggered in swift::Expr::walk(…)
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What's in this pull request?
Crash case with stack trace:
Resolved bug number: –
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