[LLVMbugs] [Bug 20037] New: Crash with static std::array in template class
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Fri Jun 13 21:10:06 PDT 2014
http://llvm.org/bugs/show_bug.cgi?id=20037
Bug ID: 20037
Summary: Crash with static std::array in template class
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++11
Assignee: unassignedclangbugs at nondot.org
Reporter: kyle at mayeses.com
CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
Classification: Unclassified
Created attachment 12656
--> http://llvm.org/bugs/attachment.cgi?id=12656&action=edit
Preprocessed source
I'm pretty sure the code below is valid C++11, but regardless of whether it is
it causes clang to crash.
Ubuntu clang version 3.5-1ubuntu1 (trunk) (based on LLVM 3.5)
#include <array>
namespace detail
{
template <typename... Types>
using Sizes = std::array<size_t, sizeof...(Types)>;
template <typename... Types>
inline std::array<size_t, sizeof...(Types)> sizes()
{
return {{sizeof(Types)...}};
}
}
template <typename First, typename... Last>
class Variant
{
static detail::Sizes<First, Last...> sizes;
public:
template <typename T>
Variant(T value)
{
// Seems to be the cause of the crash
for (auto size : sizes)
{
}
}
};
template <typename First, typename... Last>
detail::Sizes<First, Last...> Variant<First, Last...>::sizes =
detail::sizes<First, Last...>();
int main()
{
// Works
Variant<int, float> b{0};
// Crashes the compiler
Variant<int> a{0};
}
Build script:
"/usr/bin/clang" -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all
-disable-free -disable-llvm-verifier -main-file-name Test.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 -std=c++1y -fdeprecated-macro -ferror-limit 19
-fmessage-length 80 -mstackrealign -fobjc-runtime=gcc -fcxx-exceptions
-fexceptions -fdiagnostics-show-option -fcolor-diagnostics -vectorize-slp -x
c++ Test-8e0aa8.cpp
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