https://llvm.org/bugs/show_bug.cgi?id=27342
Bug ID: 27342
Summary: Segfault with function SFINAE in valid code
Product: clang
Version: 3.4
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++11
Assignee: unassignedclangb...@nondot.org
Reporter: jacquelinek...@gmail.com
CC: dgre...@apple.com, llvm-bugs@lists.llvm.org
Classification: Unclassified
With Clang 3.4-1 (on Ubuntu 14.04), Clang segfaults in a valid use of function
SFINAE (it compiles with gcc).
To summarize: class Foo inherits from pure virtual FooVirtual. Foo is templated
on the callback type of a function that it stores. Two function types are
allowed via enable_if, a void signature and a signature with a Foo&. FooFactory
instantiates a shared pointer of Foo with create_foo(callback). In main, if
FooFactory::create_foo(callback) is called with the void specialization and
callback as a local lambda with a capture list, Clang segfaults.
Please let me know if this issue can be patched, or if it is fixed in 3.5. This
use case is a requirement for my project.
source of MWE can be found here:
https://gist.github.com/jacquelinekay/ef45d875a9cfbcda1e85db27b296cf1b
Bug report artifacts:
Preprocessed source (raw):
https://gist.githubusercontent.com/jacquelinekay/2a86c34b83579e899d6c85d97907b849/raw/0d0825a4b98d6e6e1ea6a25df307a4284d8faa22/clang_segfault-3db907.cpp
Run script (raw):
https://gist.githubusercontent.com/jacquelinekay/1423a4f3376d742bbd2ba3a038b63dad/raw/8c8a7a046e7b6face415476715c53dfc461738c2/clang_segfault-3db907.sh
Backtrace/stack dump:
clang++ clang_sfinae_segfault.cpp -std=c++11
0 libLLVM-3.4.so.1 0x00007f3d4980d5d2 llvm::sys::PrintStackTrace(_IO_FILE*) +
34
1 libLLVM-3.4.so.1 0x00007f3d4980d3c4
2 libpthread.so.0 0x00007f3d48712340
3 clang 0x000000000062f1ba
4 clang 0x0000000000630c2b
5 clang 0x00000000010f2e53
clang::Stmt::printPretty(llvm::raw_ostream&, clang::PrinterHelper*,
clang::PrintingPolicy const&, unsigned int) const + 643
6 clang 0x0000000001005a39
7 clang 0x00000000010055f1
8 clang 0x00000000010055f1
9 clang 0x00000000010075f6
10 clang 0x0000000001008b69
clang::FormatASTNodeDiagnosticArgument(clang::DiagnosticsEngine::ArgumentKind,
long, char const*, unsigned int, char const*, unsigned int,
std::pair<clang::DiagnosticsEngine::ArgumentKind, long> const*, unsigned int,
llvm::SmallVectorImpl<char>&, void*, llvm::ArrayRef<long>) + 681
11 clang 0x0000000001139ddf clang::Diagnostic::FormatDiagnostic(char
const*, char const*, llvm::SmallVectorImpl<char>&) const + 1199
12 clang 0x000000000069cfd7
clang::TextDiagnosticPrinter::HandleDiagnostic(clang::DiagnosticsEngine::Level,
clang::Diagnostic const&) + 87
13 clang 0x000000000113c890
clang::DiagnosticIDs::EmitDiag(clang::DiagnosticsEngine&,
clang::DiagnosticIDs::Level) const + 48
14 clang 0x000000000113cafe
clang::DiagnosticIDs::ProcessDiag(clang::DiagnosticsEngine&) const + 382
15 clang 0x00000000011365cc
clang::DiagnosticsEngine::EmitCurrentDiagnostic(bool) + 76
16 clang 0x00000000009a9375
clang::Sema::EmitCurrentDiagnostic(unsigned int) + 837
17 clang 0x00000000009af17f
18 clang 0x0000000000b63723
clang::InitializationSequence::Diagnose(clang::Sema&, clang::InitializedEntity
const&, clang::InitializationKind const&, llvm::ArrayRef<clang::Expr*>) + 6611
19 clang 0x0000000000b581a5
clang::InitializationSequence::Perform(clang::Sema&, clang::InitializedEntity
const&, clang::InitializationKind const&, llvm::MutableArrayRef<clang::Expr*>,
clang::QualType*) + 7413
20 clang 0x0000000000b5b9e9
clang::Sema::PerformCopyInitialization(clang::InitializedEntity const&,
clang::SourceLocation, clang::ActionResult<clang::Expr*, true>, bool, bool) +
249
21 clang 0x0000000000bd0b9c
clang::Sema::PerformMoveOrCopyInitialization(clang::InitializedEntity const&,
clang::VarDecl const*, clang::QualType, clang::Expr*, bool) + 76
22 clang 0x0000000000bd34db
clang::Sema::ActOnReturnStmt(clang::SourceLocation, clang::Expr*) + 827
23 clang 0x0000000000c4ea12
24 clang 0x0000000000c606c5
25 clang 0x0000000000c611aa
26 clang 0x0000000000c612db
27 clang 0x0000000000c60805
28 clang 0x0000000000c633ef clang::Sema::SubstStmt(clang::Stmt*,
clang::MultiLevelTemplateArgumentList const&) + 79
29 clang 0x0000000000c789ee
clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation,
clang::FunctionDecl*, bool, bool) + 2702
30 clang 0x0000000000c77d7b
clang::Sema::PerformPendingInstantiations(bool) + 491
31 clang 0x00000000009ab73e clang::Sema::ActOnEndOfTranslationUnit()
+ 350
32 clang 0x000000000092b6bb
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&) + 379
33 clang 0x000000000092276b clang::ParseAST(clang::Sema&, bool,
bool) + 283
34 clang 0x0000000000671149 clang::FrontendAction::Execute() + 169
35 clang 0x0000000000651a75
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 293
36 clang 0x000000000063c9b6
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 1638
37 clang 0x0000000000638788 cc1_main(char const**, char const**,
char const*, void*) + 1176
38 clang 0x0000000000636fff main + 7519
39 libc.so.6 0x00007f3d47e44ec5 __libc_start_main + 245
40 clang 0x00000000006377ef
Stack dump:
0. Program arguments: /usr/bin/clang -cc1 -triple x86_64-pc-linux-gnu
-emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name
clang_segfault.cpp -mrelocation-model static -mdisable-fp-elim -fmath-errno
-masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array
-target-cpu x86-64 -target-linker-version 2.24 -resource-dir
/usr/bin/../lib/clang/3.4 -internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8
-internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/x86_64-linux-gnu
-internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/backward
-internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/../../../../include/x86_64-linux-gnu/c++/4.8
-internal-isystem /usr/local/include -internal-isystem
/usr/bin/../lib/clang/3.4/include -internal-externc-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/include -internal-externc-isystem
/usr/include/x86_64-linux-gnu -internal-externc-isystem /include
-internal-externc-isystem /usr/include -std=c++11 -fdeprecated-macro
-fdebug-compilation-dir /tmp -ferror-limit 19 -fmessage-length 113
-mstackrealign -fobjc-runtime=gcc -fcxx-exceptions -fexceptions
-fdiagnostics-show-option -fcolor-diagnostics -vectorize-slp -o
/tmp/clang_segfault-18865a.o -x c++ clang_segfault.cpp
1. <eof> parser at end of file
2. clang_segfault.cpp:68:3: instantiating function definition
'create_wall_timer'
clang: error: unable to execute command: Segmentation fault (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
Ubuntu clang version 3.4-1ubuntu3 (tags/RELEASE_34/final) (based on LLVM 3.4)
Target: x86_64-pc-linux-gnu
Thread model: posix
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