https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105320
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2024-03-06
Ever confirmed|0 |1
Keywords| |rejects-valid
CC| |ppalka at gcc dot gnu.org
Status|UNCONFIRMED |NEW
--- Comment #1 from Patrick Palka <ppalka at gcc dot gnu.org> ---
GCC doesn't ICE, but it rejects with:
error: conflicting declaration of template ‘template<class _Tp1,
__gnu_cxx::_Lock_policy@test_support _Lp1> class std::__shared_ptr’
note: previous declaration ‘template<class _Tp,
__gnu_cxx::_Lock_policy@test_support _Lp> class std::__shared_ptr@test_support’
error: conflicting declaration of template ‘template<class _Tp1,
__gnu_cxx::_Lock_policy@test_support _Lp1> class std::__weak_ptr’
note: previous declaration ‘template<class _Tp,
__gnu_cxx::_Lock_policy@test_support _Lp> class std::__weak_ptr@test_support’
Reduced:
$ cat 105320_a.C
module;
template<class> struct _Sp_atomic;
template<class> struct shared_ptr {
template<class> friend struct _Sp_atomic;
using atomic_type = _Sp_atomic<int>;
};
export module test_support;
export
template<class T> struct A {
shared_ptr<T> data;
};
$ cat 105320_b.C
import test_support;
A<int> a;
$ g++ -fmodules-ts 105320_{a,b}.C
105320_a.C:2:1: warning: global module fragment contents must be from
preprocessor inclusion [-Wglobal-module]
2 | template<class> struct _Sp_atomic;
| ^~~~~~~~
In module test_support, imported at 105320_b.C:1:
105320_a.C: In instantiation of ‘struct shared_ptr@test_support<int>’:
105320_a.C:11:18: required from ‘struct A@test_support<int>’
11 | shared_ptr<T> data;
| ^~~~
105320_b.C:3:8: required from here
3 | A<int> a;
| ^
105320_a.C:4:33: error: conflicting declaration of template ‘template<class>
struct _Sp_atomic’
4 | template<class> friend struct _Sp_atomic;
| ^~~~~~~~~~
105320_a.C:2:24: note: previous declaration ‘template<class> struct
_Sp_atomic@test_support’
2 | template<class> struct _Sp_atomic;
| ^~~~~~~~~~
