http://llvm.org/bugs/show_bug.cgi?id=9967
Summary: enum class values as default template arguments causes
segfault in C++0x
Product: clang
Version: unspecified
Platform: PC
OS/Version: All
Status: NEW
Severity: normal
Priority: P
Component: C++0x
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
The following code segfaults the compiler the the backtrace below. This is
causing problems with boost, because clang claims to support enum structs.
enum struct alignment
{ unaligned };
template <alignment A >
struct X {};
X<alignment::unaligned> x;
Backtrace:
ICE cannot be evaluated!
UNREACHABLE executed at ExprConstant.cpp:3057!
0 clang 0x0000000002649982
1 clang 0x000000000264977e
2 libpthread.so.0 0x00007f3249519c60
3 libc.so.6 0x00007f3248804d05 gsignal + 53
4 libc.so.6 0x00007f3248808ab6 abort + 390
5 clang 0x0000000002634fcf
6 clang 0x00000000019f3d72
clang::Expr::isIntegerConstantExpr(llvm::APSInt&, clang::ASTContext&,
clang::SourceLocation*, bool) const + 204
7 clang 0x00000000016a0c3f
clang::Sema::CheckTemplateArgument(clang::NonTypeTemplateParmDecl*,
clang::QualType, clang::Expr*, clang::TemplateArgument&,
clang::Sema::CheckTemplateArgumentKind) + 689
8 clang 0x000000000169c7de
clang::Sema::CheckTemplateArgument(clang::NamedDecl*,
clang::TemplateArgumentLoc const&, clang::NamedDecl*, clang::SourceLocation,
clang::SourceLocation, unsigned int,
llvm::SmallVectorImpl<clang::TemplateArgument>&,
clang::Sema::CheckTemplateArgumentKind) + 1014
9 clang 0x000000000169d653
clang::Sema::CheckTemplateArgumentList(clang::TemplateDecl*,
clang::SourceLocation, clang::TemplateArgumentListInfo&, bool,
llvm::SmallVectorImpl<clang::TemplateArgument>&) + 1451
10 clang 0x00000000016996b4
clang::Sema::CheckTemplateIdType(clang::TemplateName, clang::SourceLocation,
clang::TemplateArgumentListInfo&) + 520
11 clang 0x000000000169a15d
clang::Sema::ActOnTemplateIdType(clang::CXXScopeSpec&,
clang::OpaquePtr<clang::TemplateName>, clang::SourceLocation,
clang::SourceLocation, clang::ASTTemplateArgsPtr, clang::SourceLocation) + 975
12 clang 0x000000000149c0fb
clang::Parser::AnnotateTemplateIdTokenAsType() + 267
13 clang 0x00000000014b1c5a
clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&,
clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier,
clang::Parser::DeclSpecContext) + 3874
14 clang 0x00000000014a4e3e
clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsingDeclSpec&,
clang::AccessSpecifier) + 88
15 clang 0x00000000014a5251
clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&,
clang::AccessSpecifier) + 113
16 clang 0x00000000014a4ac6
clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&,
clang::Parser::ParsingDeclSpec*) + 2428
17 clang 0x00000000014a40a7
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&) + 283
18 clang 0x000000000148505c clang::ParseAST(clang::Sema&, bool) + 416
19 clang 0x00000000011f119f clang::ASTFrontendAction::ExecuteAction()
+ 263
20 clang 0x0000000001325a7b clang::CodeGenAction::ExecuteAction() +
927
21 clang 0x00000000011f0dfb clang::FrontendAction::Execute() + 325
22 clang 0x00000000011d7feb
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 741
23 clang 0x000000000117ee13
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 909
24 clang 0x000000000117034a cc1_main(char const**, char const**, char
const*, void*) + 952
25 clang 0x000000000117a5a3 main + 496
26 libc.so.6 0x00007f32487efeff __libc_start_main + 255
27 clang 0x000000000116fa19
Stack dump:
0. Program arguments: /llvmdebug/bin/clang -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name
t.cc -mrelocation-model static -mdisable-fp-elim -masm-verbose
-mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-linker-version
2.21.51.20110409 -momit-leaf-frame-pointer -resource-dir
/llvmdebug/bin/../lib/clang/3.0 -std=gnu++0x -fdeprecated-macro -ferror-limit
19 -fmessage-length 180 -fcxx-exceptions -fexceptions -fgnu-runtime
-fdiagnostics-show-option -fcolor-diagnostics -o /tmp/cc-XS6Ybo.o -x c++ t.cc
1. t.cc:8:1: at annotation token
clang: error: unable to execute command: Aborted
clang: error: clang frontend command failed due to signal 1 (use -v to see
invocation)
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