[Bug c++/114275] using std::thread within a templated function in a module fails to compile

["pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114275

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |rejects-valid

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
In file included from
/home/apinski/upstream-gcc-match/include/c++/14.0.1/bits/std_thread.h:39,
                 from
/home/apinski/upstream-gcc-match/include/c++/14.0.1/stop_token:40,
                 from
/home/apinski/upstream-gcc-match/include/c++/14.0.1/thread:42,
                 from A.ixx:4,
of module A, imported at main.cpp:2:
/home/apinski/upstream-gcc-match/include/c++/14.0.1/tuple: In instantiation of
‘struct std::_Tuple_impl@A<0, fun@A<int>(int&&)::<lambda()> >’:
/home/apinski/upstream-gcc-match/include/c++/14.0.1/tuple:834:11:   required
from ‘class std::tuple@A<fun@A<int>(int&&)::<lambda()> >’
  834 |     class tuple : public _Tuple_impl<0, _Elements...>
      |           ^~~~~
/home/apinski/upstream-gcc-match/include/c++/14.0.1/bits/std_thread.h:280:9:  
required from ‘struct
std::thread@A::_Invoker<std::tuple@A<fun@A<int>(int&&)::<lambda()> > >’
  280 |         _Tuple _M_t;
      |                ^~~~
/home/apinski/upstream-gcc-match/include/c++/14.0.1/bits/std_thread.h:236:13:  
required from ‘struct
std::thread@A::_State_impl<std::thread@A::_Invoker<std::tuple@A<fun@A<int>(int&&)::<lambda()>
> > >’
  236 |         _Callable               _M_func;
      |                                 ^~~~~~~
/home/apinski/upstream-gcc-match/include/c++/14.0.1/bits/std_thread.h:164:29:  
required from ‘std::thread@A::thread(_Callable&&, _Args&& ...) [with _Callable
= fun@A<int>(int&&)::<lambda()>; _Args = {}; <template-parameter-1-3> = void]’
  164 |         _M_start_thread(_State_ptr(new _State_impl<_Wrapper>(
      |                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~
  165 |               std::forward<_Callable>(__f),
std::forward<_Args>(__args)...)),
      |              
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A.ixx:10:8:   required from ‘void fun@A(auto:38&&) [with auto:38 = int]’
   10 |                 std::thread([]{}).join();
      |                      ^~~~~~~~~~~~
main.cpp:6:6:   required from here
    6 |                 fun(42);
      |                 ~~~^~~~
/home/apinski/upstream-gcc-match/include/c++/14.0.1/tuple:551:51: error:
conflicting declaration of template ‘template<long unsigned int <anonymous>,
class ...> struct std::_Tuple_impl’
  551 |       template<size_t, typename...> friend struct _Tuple_impl;
      |                                                   ^~~~~~~~~~~