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Add test case for crash triggered in `swift::ASTVisitor`. Current number of unresolved compiler crashers: 38 (5427 resolved) Stack trace: ``` 0 0x00000000036216a8 llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/path/to/swift/bin/swift+0x36216a8) 1 0x0000000003621de6 SignalHandler(int) (/path/to/swift/bin/swift+0x3621de6) 2 0x00007fbc88e4a3e0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x113e0) 3 0x00007fbc877b0428 gsignal /build/glibc-Qz8a69/glibc-2.23/signal/../sysdeps/unix/sysv/linux/raise.c:54:0 4 0x00007fbc877b202a abort /build/glibc-Qz8a69/glibc-2.23/stdlib/abort.c:91:0 5 0x000000000130ac64 (anonymous namespace)::Verifier::checkSourceRanges(swift::SourceRange, swift::ASTWalker::ParentTy, std::function<void ()>) (/path/to/swift/bin/swift+0x130ac64) 6 0x000000000131138b (anonymous namespace)::Verifier::checkSourceRanges(swift::Pattern*) (/path/to/swift/bin/swift+0x131138b) 7 0x0000000001307c1d (anonymous namespace)::Verifier::walkToPatternPost(swift::Pattern*) (/path/to/swift/bin/swift+0x1307c1d) 8 0x000000000131b3e6 (anonymous namespace)::Traversal::visit(swift::Pattern*) (/path/to/swift/bin/swift+0x131b3e6) 9 0x000000000131b6cf (anonymous namespace)::Traversal::visit(swift::Pattern*) (/path/to/swift/bin/swift+0x131b6cf) 10 0x000000000131aae4 swift::ASTVisitor<(anonymous namespace)::Traversal, swift::Expr*, swift::Stmt*, bool, swift::Pattern*, bool, void>::visit(swift::Stmt*) (/path/to/swift/bin/swift+0x131aae4) 11 0x000000000131af1e swift::ASTVisitor<(anonymous namespace)::Traversal, swift::Expr*, swift::Stmt*, bool, swift::Pattern*, bool, void>::visit(swift::Stmt*) (/path/to/swift/bin/swift+0x131af1e) 12 0x000000000131a050 swift::ASTVisitor<(anonymous namespace)::Traversal, swift::Expr*, swift::Stmt*, bool, swift::Pattern*, bool, void>::visit(swift::Stmt*) (/path/to/swift/bin/swift+0x131a050) 13 0x0000000001317007 (anonymous namespace)::Traversal::doIt(swift::Decl*) (/path/to/swift/bin/swift+0x1317007) 14 0x0000000001316d84 swift::Decl::walk(swift::ASTWalker&) (/path/to/swift/bin/swift+0x1316d84) 15 0x000000000137221e swift::SourceFile::walk(swift::ASTWalker&) (/path/to/swift/bin/swift+0x137221e) 16 0x00000000012fef65 swift::verify(swift::SourceFile&) (/path/to/swift/bin/swift+0x12fef65) 17 0x0000000001124e59 swift::performTypeChecking(swift::SourceFile&, swift::TopLevelContext&, swift::OptionSet<swift::TypeCheckingFlags, unsigned int>, unsigned int, unsigned int) (/path/to/swift/bin/swift+0x1124e59) 18 0x0000000000e9cdc6 swift::CompilerInstance::performSema() (/path/to/swift/bin/swift+0xe9cdc6) 19 0x000000000047d371 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/path/to/swift/bin/swift+0x47d371) 20 0x000000000043b2b7 main (/path/to/swift/bin/swift+0x43b2b7) 21 0x00007fbc8779b830 __libc_start_main /build/glibc-Qz8a69/glibc-2.23/csu/../csu/libc-start.c:325:0 22 0x00000000004386f9 _start (/path/to/swift/bin/swift+0x4386f9) ```
10 lines
422 B
Swift
10 lines
422 B
Swift
// This source file is part of the Swift.org open source project
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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// RUN: not --crash %target-swift-frontend %s -emit-ir
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switch{case.b(u){
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