https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77998
Bug ID: 77998
Summary: clang rejects std::thread from trunk
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
Target Milestone: ---
markus@x4 tmp % cat thread.cpp
#include <thread>
#include <vector>
int main() {
std::vector<std::thread> threads;
threads.emplace_back([]() {});
}
markus@x4 tmp % g++ -c thread.cpp
markus@x4 tmp % clang++ -c thread.cpp
In file included from thread.cpp:1:
/usr/lib64/gcc/x86_64-pc-linux-gnu/7.0.0/include/g++-v7/thread:239:39: error:
member access into incomplete type 'std::thread::_Invoker<std::tuple<(lambda at
thread.cpp:6:24)> >'
= decltype(std::declval<_Invoker>()._M_invoke(_Indices()));
^
/usr/lib64/gcc/x86_64-pc-linux-gnu/7.0.0/include/g++-v7/thread:126:8: note: in
instantiation of template class 'std::thread::_Invoker<std::tuple<(lambda at
thread.cpp:6:24)> >'
requested here
__make_invoker(std::forward<_Callable>(__f),
^
/usr/lib64/gcc/x86_64-pc-linux-gnu/7.0.0/include/g++-v7/ext/new_allocator.h:120:23:
note: in instantiation of function template specialization
'std::thread::thread<(lambda at thread.cpp:6:24)>' requested here
{ ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }
^
/usr/lib64/gcc/x86_64-pc-linux-gnu/7.0.0/include/g++-v7/bits/alloc_traits.h:455:8:
note: in instantiation of function template specialization
'__gnu_cxx::new_allocator<std::thread>::construct<std::thread, (lambda at
thread.cpp:6:24)>' requested here
{ __a.construct(__p, std::forward<_Args>(__args)...); }
^
/usr/lib64/gcc/x86_64-pc-linux-gnu/7.0.0/include/g++-v7/bits/vector.tcc:96:21:
note: in instantiation of function template specialization
'std::allocator_traits<std::allocator<std::thread>
>::construct<std::thread, (lambda at thread.cpp:6:24)>' requested here
_Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
^
thread.cpp:6:11: note: in instantiation of function template specialization
'std::vector<std::thread, std::allocator<std::thread> >::emplace_back<(lambda
at thread.cpp:6:24)>'
requested here
threads.emplace_back([]() {});
^
/usr/lib64/gcc/x86_64-pc-linux-gnu/7.0.0/include/g++-v7/thread:220:14: note:
definition of 'std::thread::_Invoker<std::tuple<(lambda at thread.cpp:6:24)> >'
is not complete until
the closing '}'
struct _Invoker
^
1 error generated.
