[llvm-bugs] [Bug 42205] New: An ICE given some parameters and templates
via llvm-bugs
llvm-bugs at lists.llvm.org
Sun Jun 9 02:16:07 PDT 2019
https://bugs.llvm.org/show_bug.cgi?id=42205
Bug ID: 42205
Summary: An ICE given some parameters and templates
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C++
Assignee: unassignedclangbugs at nondot.org
Reporter: zhonghao at pku.org.cn
CC: blitzrakete at gmail.com, dgregor at apple.com,
erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
richard-llvm at metafoo.co.uk
My clang is 9.0.0, and my code is:
template <class> bool a;
template <typename> struct b;
struct B {
template <typename... e> static auto d = a<e...>;
template <typename... e> static auto d<b<e...>> = d<e...>;
} c;
With clang -g and clang++ -Weffc++ -gsplit-dwarf, I got the following ICE:
Stack dump:
0. Program arguments: /usr/local/lib/clang8/bin/clang-9 -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free
-disable-llvm-verifier -discard-value-names -main-file-name code2.c.cpp
-mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno
-masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array
-target-cpu x86-64 -dwarf-column-info -enable-split-dwarf
-debug-info-kind=limited -dwarf-version=4 -debugger-tuning=gdb -ggnu-pubnames
-split-dwarf-file code2.dwo -resource-dir /usr/local/lib/clang8/lib/clang/9.0.0
-internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0/../../../../include/c++/7.4.0
-internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0/../../../../include/x86_64-linux-gnu/c++/7.4.0
-internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0/../../../../include/x86_64-linux-gnu/c++/7.4.0
-internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0/../../../../include/c++/7.4.0/backward
-internal-isystem /usr/local/include -internal-isystem
/usr/local/lib/clang8/lib/clang/9.0.0/include -internal-externc-isystem
/usr/include/x86_64-linux-gnu -internal-externc-isystem /include
-internal-externc-isystem /usr/include -Weffc++ -fdeprecated-macro
-fdebug-compilation-dir /home/haozhong -ferror-limit 19 -fmessage-length 0
-fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option
-fcolor-diagnostics -faddrsig -o /tmp/code2-9ca9c5.o -x c++
/home/haozhong/project/approach/compilerpara/llvm/tmp/llvm_38004/code2.c.cpp
1. <eof> parser at end of file
2.
/home/haozhong/project/approach/compilerpara/llvm/tmp/llvm_38004/code2.c.cpp:3:8:
LLVM IR generation of declaration 'B'
3.
/home/haozhong/project/approach/compilerpara/llvm/tmp/llvm_38004/code2.c.cpp:6:3:
Generating code for declaration 'c'
#0 0x000055a25a05254a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/local/lib/clang8/bin/clang-9+0x169b54a)
#1 0x000055a25a050314 llvm::sys::RunSignalHandlers()
(/usr/local/lib/clang8/bin/clang-9+0x1699314)
#2 0x000055a25a050452 SignalHandler(int)
(/usr/local/lib/clang8/bin/clang-9+0x1699452)
#3 0x00007f1b6b3ca890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x000055a25a2736a8 UnwrapTypeForDebugInfo(clang::QualType,
clang::ASTContext const&) (/usr/local/lib/clang8/bin/clang-9+0x18bc6a8)
#5 0x000055a25a2814cb
clang::CodeGen::CGDebugInfo::getOrCreateType(clang::QualType, llvm::DIFile*)
(/usr/local/lib/clang8/bin/clang-9+0x18ca4cb)
#6 0x000055a25a28346b
clang::CodeGen::CGDebugInfo::CreateRecordStaticField(clang::VarDecl const*,
llvm::DIType*, clang::RecordDecl const*)
(/usr/local/lib/clang8/bin/clang-9+0x18cc46b)
#7 0x000055a25a283d4b
clang::CodeGen::CGDebugInfo::CollectRecordFields(clang::RecordDecl const*,
llvm::DIFile*, llvm::SmallVectorImpl<llvm::Metadata*>&, llvm::DICompositeType*)
(/usr/local/lib/clang8/bin/clang-9+0x18ccd4b)
#8 0x000055a25a280cb9
clang::CodeGen::CGDebugInfo::CreateTypeDefinition(clang::RecordType const*)
(/usr/local/lib/clang8/bin/clang-9+0x18c9cb9)
#9 0x000055a25a281516
clang::CodeGen::CGDebugInfo::getOrCreateType(clang::QualType, llvm::DIFile*)
(/usr/local/lib/clang8/bin/clang-9+0x18ca516)
#10 0x000055a25a28c7ff
clang::CodeGen::CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable*,
clang::VarDecl const*) (/usr/local/lib/clang8/bin/clang-9+0x18d57ff)
#11 0x000055a25a31575b
clang::CodeGen::CodeGenModule::EmitGlobalVarDefinition(clang::VarDecl const*,
bool) (/usr/local/lib/clang8/bin/clang-9+0x195e75b)
#12 0x000055a25a32d402
clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl,
llvm::GlobalValue*) (/usr/local/lib/clang8/bin/clang-9+0x1976402)
#13 0x000055a25a32dbf3
clang::CodeGen::CodeGenModule::EmitGlobal(clang::GlobalDecl)
(/usr/local/lib/clang8/bin/clang-9+0x1976bf3)
#14 0x000055a25a332ad7
clang::CodeGen::CodeGenModule::EmitTopLevelDecl(clang::Decl*) (.part.4529)
(/usr/local/lib/clang8/bin/clang-9+0x197bad7)
#15 0x000055a25ac416b3 (anonymous
namespace)::CodeGeneratorImpl::HandleTopLevelDecl(clang::DeclGroupRef)
(/usr/local/lib/clang8/bin/clang-9+0x228a6b3)
#16 0x000055a25ac36386
clang::BackendConsumer::HandleTopLevelDecl(clang::DeclGroupRef)
(/usr/local/lib/clang8/bin/clang-9+0x227f386)
#17 0x000055a25b7401c4 clang::ParseAST(clang::Sema&, bool, bool)
(/usr/local/lib/clang8/bin/clang-9+0x2d891c4)
#18 0x000055a25ac3e737 clang::CodeGenAction::ExecuteAction()
(/usr/local/lib/clang8/bin/clang-9+0x2287737)
#19 0x000055a25a70d8f6 clang::FrontendAction::Execute()
(/usr/local/lib/clang8/bin/clang-9+0x1d568f6)
#20 0x000055a25a6d00ac
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/local/lib/clang8/bin/clang-9+0x1d190ac)
#21 0x000055a25a7ccbe3
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/local/lib/clang8/bin/clang-9+0x1e15be3)
#22 0x000055a259252170 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/usr/local/lib/clang8/bin/clang-9+0x89b170)
#23 0x000055a2591f0132 main (/usr/local/lib/clang8/bin/clang-9+0x839132)
#24 0x00007f1b6a4a5b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#25 0x000055a25924f98a _start (/usr/local/lib/clang8/bin/clang-9+0x89898a)
clang-9: error: unable to execute command: Segmentation fault (core dumped)
clang-9: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 9.0.0 (trunk 362565) (llvm/trunk 362564)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang-9: note: diagnostic msg: PLEASE submit a bug report to
https://bugs.llvm.org/ and include the crash backtrace, preprocessed source,
and associated run script.
clang-9: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-9: note: diagnostic msg: /tmp/code2-e27fd0.cpp
clang-9: note: diagnostic msg: /tmp/code2-e27fd0.sh
clang-9: note: diagnostic msg:
********************
Gcc rejects the code:
error: explicit template argument list not allowed
5 | template <typename... e> static auto d<b<e...>> = d<e...>;
| ^~~~~~~~~~
------------------------------------------------
With some other parameters ( clang++ -O3), clang accepts the code.
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