[Bug c++/99568] New: ICE when compiling basic module: internal compiler error: in module_may_redeclare, at cp/module.cc:18453
ryan.burn at gmail dot com
gcc-bugzilla@gcc.gnu.org
Fri Mar 12 23:13:40 GMT 2021
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99568
Bug ID: 99568
Summary: ICE when compiling basic module: internal compiler
error: in module_may_redeclare, at cp/module.cc:18453
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ryan.burn at gmail dot com
Target Milestone: ---
Here's how to reproduce
/// say_hello.cc
module;
#include <iostream>
#include <string_view>
export module Hello;
// the module purview starts here
// provide a function to users by exporting it
export void SayHello
(std::string_view const &name)
{
std::cout << "Hello " << name << "!\n";
}
/// main.cc
import Hello;
#include <string_view>
int main() {
SayHello("world");
return 0;
}
If I compile with
g++ -fmodules-ts -std=c++20 -c say_hello.cc
g++ -fmodules-ts -std=c++20 -c main.cc
I get the ICE below.
This is my gcc version
root@15a43977d8e1:/hello-world# g++ --version
g++ (GCC) 11.0.1 20210311 (experimental)
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
root@15a43977d8e1:/hello-world# g++ -fmodules-ts -std=c++20 -c main.cc
In file included from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:61,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/bits/cpp_type_traits.h:429:7: error: template
definition of non-template 'enum
std::__is_nonvolatile_trivially_copyable<_Tp>::<unnamed>'
429 | enum { __value = __is_trivially_copyable(_Tp) };
| ^~~~
/usr/local/include/c++/11.0.1/bits/cpp_type_traits.h:436:12: error:
redefinition of 'struct std::__is_nonvolatile_trivially_copyable<volatile _Tp>'
436 | struct __is_nonvolatile_trivially_copyable<volatile _Tp>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:61,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/ios:40,
from /usr/local/include/c++/11.0.1/ostream:38,
from /usr/local/include/c++/11.0.1/iostream:39,
from say_hello.cc:4,
of module Hello, imported at main.cc:2:
/usr/local/include/c++/11.0.1/bits/cpp_type_traits.h:436:12: note: previous
definition of 'struct std::__is_nonvolatile_trivially_copyable<volatile _Tp>'
436 | struct __is_nonvolatile_trivially_copyable<volatile _Tp>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:63,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/ext/numeric_traits.h:159:41: error: template
definition of non-template 'const int
__gnu_cxx::__numeric_traits_floating<_Value>::__max_digits10'
159 | static const int __max_digits10 = __glibcxx_max_digits10(_Value);
| ^~~~~~~~~~~~~~~~~~~~~~
/usr/local/include/c++/11.0.1/ext/numeric_traits.h:162:39: error: template
definition of non-template 'const bool
__gnu_cxx::__numeric_traits_floating<_Value>::__is_signed'
162 | static const bool __is_signed = true;
| ^~~~
/usr/local/include/c++/11.0.1/ext/numeric_traits.h:163:37: error: template
definition of non-template 'const int
__gnu_cxx::__numeric_traits_floating<_Value>::__digits10'
163 | static const int __digits10 = __glibcxx_digits10(_Value);
| ^~~~~~~~~~~~~~~~~~
/usr/local/include/c++/11.0.1/ext/numeric_traits.h:164:43: error: template
definition of non-template 'const int
__gnu_cxx::__numeric_traits_floating<_Value>::__max_exponent10'
164 | static const int __max_exponent10 =
__glibcxx_max_exponent10(_Value);
| ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/nested_exception.h:40,
from /usr/local/include/c++/11.0.1/exception:148,
from /usr/local/include/c++/11.0.1/ios:39,
from /usr/local/include/c++/11.0.1/ostream:38,
from /usr/local/include/c++/11.0.1/iostream:39,
from say_hello.cc:4,
of module Hello, imported at main.cc:2:
/usr/local/include/c++/11.0.1/type_traits:231:11: error: conflicting global
module declaration 'template<class _Tp> using __remove_cv_t = typename
std::remove_cv@Hello::type'
231 | using __remove_cv_t = typename remove_cv<_Tp>::type;
| ^~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/stl_pair.h:59,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:64,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/type_traits:231:11: note: existing declaration
'template<class _Tp> using __remove_cv_t = typename std::remove_cv::type'
231 | using __remove_cv_t = typename remove_cv<_Tp>::type;
| ^~~~~~~~~~~~~
/usr/local/include/c++/11.0.1/type_traits:249:45: note: during load of pendings
for 'std::__remove_cv_t'
249 | : public __is_void_helper<__remove_cv_t<_Tp>>::type
| ^~~
/usr/local/include/c++/11.0.1/type_traits:820:40: error: template definition of
non-template 'typedef decltype (__test<_Tp>(0))
std::__is_destructible_impl<_Tp>::type'
820 | typedef decltype(__test<_Tp>(0)) type;
| ^~~~
/usr/local/include/c++/11.0.1/type_traits:871:40: error: template definition of
non-template 'typedef decltype (__test<_Tp>(0))
std::__is_nt_destructible_impl<_Tp>::type'
871 | typedef decltype(__test<_Tp>(0)) type;
| ^~~~
/usr/local/include/c++/11.0.1/type_traits:1102:12: error: redefinition of
'struct std::__is_nt_copy_assignable_impl<_Tp, false>'
1102 | struct __is_nt_copy_assignable_impl<_Tp, false>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/nested_exception.h:40,
from /usr/local/include/c++/11.0.1/exception:148,
from /usr/local/include/c++/11.0.1/ios:39,
from /usr/local/include/c++/11.0.1/ostream:38,
from /usr/local/include/c++/11.0.1/iostream:39,
from say_hello.cc:4,
of module Hello, imported at main.cc:2:
/usr/local/include/c++/11.0.1/type_traits:1102:12: note: previous definition of
'struct std::__is_nt_copy_assignable_impl<_Tp, false>'
1102 | struct __is_nt_copy_assignable_impl<_Tp, false>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/stl_pair.h:59,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:64,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/type_traits:1106:12: error: redefinition of
'struct std::__is_nt_copy_assignable_impl<_Tp, true>'
1106 | struct __is_nt_copy_assignable_impl<_Tp, true>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/nested_exception.h:40,
from /usr/local/include/c++/11.0.1/exception:148,
from /usr/local/include/c++/11.0.1/ios:39,
from /usr/local/include/c++/11.0.1/ostream:38,
from /usr/local/include/c++/11.0.1/iostream:39,
from say_hello.cc:4,
of module Hello, imported at main.cc:2:
/usr/local/include/c++/11.0.1/type_traits:1106:12: note: previous definition of
'struct std::__is_nt_copy_assignable_impl<_Tp, true>'
1106 | struct __is_nt_copy_assignable_impl<_Tp, true>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/stl_pair.h:59,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:64,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/type_traits:1566:21: error: default argument for
template parameter for class enclosing 'std::__add_lvalue_reference_helper<_Tp,
<anonymous> >::type'
1566 | { typedef _Tp type; };
| ^~~~
/usr/local/include/c++/11.0.1/type_traits:1566:21: error: template definition
of non-template 'typedef _Tp std::__add_lvalue_reference_helper<_Tp,
<anonymous> >::type'
/usr/local/include/c++/11.0.1/type_traits:1569:12: error: redefinition of
'struct std::__add_lvalue_reference_helper<_Tp, true>'
1569 | struct __add_lvalue_reference_helper<_Tp, true>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/nested_exception.h:40,
from /usr/local/include/c++/11.0.1/exception:148,
from /usr/local/include/c++/11.0.1/ios:39,
from /usr/local/include/c++/11.0.1/ostream:38,
from /usr/local/include/c++/11.0.1/iostream:39,
from say_hello.cc:4,
of module Hello, imported at main.cc:2:
/usr/local/include/c++/11.0.1/type_traits:1569:12: note: previous definition of
'struct std::__add_lvalue_reference_helper<_Tp, true>'
1569 | struct __add_lvalue_reference_helper<_Tp, true>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/stl_pair.h:59,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:64,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/type_traits:1575:47: error: wrong number of
template arguments (1, should be 2)
1575 | : public __add_lvalue_reference_helper<_Tp>
| ^
/usr/local/include/c++/11.0.1/type_traits:1565:12: note: provided for
'template<class _Tp, bool <anonymous> > struct
std::__add_lvalue_reference_helper'
1565 | struct __add_lvalue_reference_helper
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/include/c++/11.0.1/type_traits:1945:12: error: redefinition of
'struct std::remove_all_extents< <template-parameter-1-1> >'
1945 | struct remove_all_extents
| ^~~~~~~~~~~~~~~~~~
/usr/local/include/c++/11.0.1/type_traits:790:12: note: previous definition of
'struct std::remove_all_extents< <template-parameter-1-1> >'
790 | struct remove_all_extents;
| ^~~~~~~~~~~~~~~~~~
/usr/local/include/c++/11.0.1/type_traits:1949:12: error: redefinition of
'struct std::remove_all_extents<_Tp [_Size]>'
1949 | struct remove_all_extents<_Tp[_Size]>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/nested_exception.h:40,
from /usr/local/include/c++/11.0.1/exception:148,
from /usr/local/include/c++/11.0.1/ios:39,
from /usr/local/include/c++/11.0.1/ostream:38,
from /usr/local/include/c++/11.0.1/iostream:39,
from say_hello.cc:4,
of module Hello, imported at main.cc:2:
/usr/local/include/c++/11.0.1/type_traits:1949:12: note: previous definition of
'struct std::remove_all_extents<_Tp [_Size]>'
1949 | struct remove_all_extents<_Tp[_Size]>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/stl_pair.h:59,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:64,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/type_traits:1953:12: error: redefinition of
'struct std::remove_all_extents<_Tp []>'
1953 | struct remove_all_extents<_Tp[]>
| ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/nested_exception.h:40,
from /usr/local/include/c++/11.0.1/exception:148,
from /usr/local/include/c++/11.0.1/ios:39,
from /usr/local/include/c++/11.0.1/ostream:38,
from /usr/local/include/c++/11.0.1/iostream:39,
from say_hello.cc:4,
of module Hello, imported at main.cc:2:
/usr/local/include/c++/11.0.1/type_traits:1953:12: note: previous definition of
'struct std::remove_all_extents<_Tp []>'
1953 | struct remove_all_extents<_Tp[]>
| ^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/include/c++/11.0.1/type_traits:2170:11: error: conflicting global
module declaration 'template<class _Tp> using __remove_cvref_t = typename
std::remove_cv@Hello<typename std::remove_reference@Hello<_Tp>::type>::type'
2170 | using __remove_cvref_t
| ^~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/stl_pair.h:59,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:64,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/type_traits:2170:11: note: existing declaration
'template<class _Tp> using __remove_cvref_t = typename std::remove_cv<typename
std::remove_reference<_Tp>::type>::type'
2170 | using __remove_cvref_t
| ^~~~~~~~~~~~~~~~
/usr/local/include/c++/11.0.1/type_traits:2195:77: note: during load of
pendings for 'std::__remove_cvref_t'
2195 | static __success_type<__remove_cvref_t<__cond_t<const _Tp&, const
_Up&>>>
|
^~
/usr/local/include/c++/11.0.1/type_traits:2401:12: error: redefinition of
'struct std::__result_of_memobj<_Res _Class::*, _Arg>'
2401 | struct __result_of_memobj<_Res _Class::*, _Arg>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/nested_exception.h:40,
from /usr/local/include/c++/11.0.1/exception:148,
from /usr/local/include/c++/11.0.1/ios:39,
from /usr/local/include/c++/11.0.1/ostream:38,
from /usr/local/include/c++/11.0.1/iostream:39,
from say_hello.cc:4,
of module Hello, imported at main.cc:2:
/usr/local/include/c++/11.0.1/type_traits:2401:12: note: previous definition of
'struct std::__result_of_memobj<_Res _Class::*, _Arg>'
2401 | struct __result_of_memobj<_Res _Class::*, _Arg>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/stl_pair.h:59,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:64,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/type_traits:2416:12: error: redefinition of
'struct std::__result_of_memfun<_Res _Class::*, _Arg, _Args ...>'
2416 | struct __result_of_memfun<_Res _Class::*, _Arg, _Args...>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/nested_exception.h:40,
from /usr/local/include/c++/11.0.1/exception:148,
from /usr/local/include/c++/11.0.1/ios:39,
from /usr/local/include/c++/11.0.1/ostream:38,
from /usr/local/include/c++/11.0.1/iostream:39,
from say_hello.cc:4,
of module Hello, imported at main.cc:2:
/usr/local/include/c++/11.0.1/type_traits:2416:12: note: previous definition of
'struct std::__result_of_memfun<_Res _Class::*, _Arg, _Args ...>'
2416 | struct __result_of_memfun<_Res _Class::*, _Arg, _Args...>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/include/c++/11.0.1/type_traits:3292:11: error: conflicting global
module declaration 'template<class _From, class _To> using __copy_cv = typename
std::__match_cv_qualifiers@Hello<_From, _To>::__type'
3292 | using __copy_cv = typename __match_cv_qualifiers<_From,
_To>::__type;
| ^~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/stl_pair.h:59,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:64,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/type_traits:3292:11: note: existing declaration
'template<class _From, class _To> using __copy_cv = typename
std::__match_cv_qualifiers<_From, _To>::__type'
3292 | using __copy_cv = typename __match_cv_qualifiers<_From,
_To>::__type;
| ^~~~~~~~~
/usr/local/include/c++/11.0.1/type_traits:3309:45: note: during load of
pendings for 'std::__copy_cv'
3309 | __void_t<__cond_res<__copy_cv<_Xp, _Yp>&, __copy_cv<_Yp, _Xp>&>>>
| ^
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/nested_exception.h:40,
from /usr/local/include/c++/11.0.1/exception:148,
from /usr/local/include/c++/11.0.1/ios:39,
from /usr/local/include/c++/11.0.1/ostream:38,
from /usr/local/include/c++/11.0.1/iostream:39,
from say_hello.cc:4,
of module Hello, imported at main.cc:2:
/usr/local/include/c++/11.0.1/type_traits:3357:11: error: conflicting global
module declaration 'template<class _Tp1, class _Tp2> using __basic_common_ref =
typename std::basic_common_reference<typename std::remove_cv@Hello<typename
std::remove_reference@Hello<_Tp>::type>::type, typename
std::remove_cv@Hello<typename std::remove_reference@Hello<_Arg>::type>::type,
std::__xref@Hello<_Tp>::template __type, std::__xref@Hello<_Tp2>::template
__type>::type'
3357 | using __basic_common_ref
| ^~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/stl_pair.h:59,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:64,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/type_traits:3357:11: note: existing declaration
'template<class _Tp1, class _Tp2> using __basic_common_ref = typename
std::basic_common_reference<typename std::remove_cv@Hello<typename
std::remove_reference@Hello<_Tp>::type>::type, typename std::remove_cv<typename
std::remove_reference<_Arg>::type>::type, std::__xref<_Tp>::template __type,
std::__xref<_Tp2>::template __type>::type'
3357 | using __basic_common_ref
| ^~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/nested_exception.h:40,
from /usr/local/include/c++/11.0.1/exception:148,
from /usr/local/include/c++/11.0.1/ios:39,
from /usr/local/include/c++/11.0.1/ostream:38,
from /usr/local/include/c++/11.0.1/iostream:39,
from say_hello.cc:4,
of module Hello, imported at main.cc:2:
/usr/local/include/c++/11.0.1/type_traits:2522:11: error: conflicting global
module declaration 'template<class ... _Tp> using common_type_t = typename
std::common_type@Hello::type'
2522 | using common_type_t = typename common_type<_Tp...>::type;
| ^~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/stl_pair.h:59,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:64,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/type_traits:2522:11: note: existing declaration
'template<class ... _Tp> using common_type_t = typename std::common_type::type'
2522 | using common_type_t = typename common_type<_Tp...>::type;
| ^~~~~~~~~~~~~
/usr/local/include/c++/11.0.1/type_traits:3381:54: note: during load of
pendings for 'std::__common_reference_impl'
3381 | : __common_reference_impl<_Tp1, _Tp2, _Bullet + 1>
| ^
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/nested_exception.h:40,
from /usr/local/include/c++/11.0.1/exception:148,
from /usr/local/include/c++/11.0.1/ios:39,
from /usr/local/include/c++/11.0.1/ostream:38,
from /usr/local/include/c++/11.0.1/iostream:39,
from say_hello.cc:4,
of module Hello, imported at main.cc:2:
/usr/local/include/c++/11.0.1/type_traits:3367:11: error: conflicting global
module declaration 'template<class ... _Tp> using common_reference_t = typename
std::common_reference@Hello::type'
3367 | using common_reference_t = typename common_reference<_Tp...>::type;
| ^~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/move.h:57,
from /usr/local/include/c++/11.0.1/bits/stl_pair.h:59,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:64,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/type_traits:3367:11: note: existing declaration
'template<class ... _Tp> using common_reference_t = typename
std::common_reference::type'
3367 | using common_reference_t = typename common_reference<_Tp...>::type;
| ^~~~~~~~~~~~~~~~~~
/usr/local/include/c++/11.0.1/type_traits:3445:63: note: during load of
pendings for 'std::common_reference_t'
3445 | void_t<common_reference_t<_Tp1, _Tp2>>>
| ^~~~
In file included from /usr/local/include/c++/11.0.1/bits/stl_pair.h:65,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:64,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/ios:40,
from /usr/local/include/c++/11.0.1/ostream:38,
from /usr/local/include/c++/11.0.1/iostream:39,
from say_hello.cc:4,
of module Hello, imported at main.cc:2:
/usr/local/include/c++/11.0.1/compare:405:11: error: conflicting global module
declaration 'template<class ... _Ts> using common_comparison_category_t =
typename std::common_comparison_category@Hello::type'
405 | using common_comparison_category_t
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/11.0.1/bits/stl_pair.h:65,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:64,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/compare:405:11: note: existing declaration
'template<class ... _Ts> using common_comparison_category_t = typename
std::common_comparison_category::type'
405 | using common_comparison_category_t
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/include/c++/11.0.1/compare:413:57: note: during load of pendings for
'std::common_comparison_category_t'
413 | = same_as<common_comparison_category_t<_Tp, _Cat>, _Cat>;
| ^
In file included from /usr/local/include/c++/11.0.1/bits/stl_iterator.h:82,
from /usr/local/include/c++/11.0.1/bits/stl_algobase.h:67,
from /usr/local/include/c++/11.0.1/bits/char_traits.h:39,
from /usr/local/include/c++/11.0.1/string_view:41,
from main.cc:4:
/usr/local/include/c++/11.0.1/new:89:27: internal compiler error: in
module_may_redeclare, at cp/module.cc:18453
89 | enum class align_val_t: size_t {};
| ^~~~~~
0x69ca74 module_may_redeclare(tree_node*)
../../gcc/cp/module.cc:18453
0x981c01 start_enum(tree_node*, tree_node*, tree_node*, tree_node*, bool,
bool*)
../../gcc/cp/decl.c:15662
0xa63c27 cp_parser_enum_specifier
../../gcc/cp/parser.c:19975
0xa63c27 cp_parser_type_specifier
../../gcc/cp/parser.c:18401
0xa64919 cp_parser_decl_specifier_seq
../../gcc/cp/parser.c:15051
0xa656f1 cp_parser_simple_declaration
../../gcc/cp/parser.c:14308
0xa923c5 cp_parser_declaration
../../gcc/cp/parser.c:14126
0xa91cf9 cp_parser_toplevel_declaration
../../gcc/cp/parser.c:14155
0xa91cf9 cp_parser_declaration_seq_opt
../../gcc/cp/parser.c:13943
0xa92192 cp_parser_namespace_body
../../gcc/cp/parser.c:20443
0xa92192 cp_parser_namespace_definition
../../gcc/cp/parser.c:20421
0xa928e8 cp_parser_declaration
../../gcc/cp/parser.c:14106
0xa91cf9 cp_parser_toplevel_declaration
../../gcc/cp/parser.c:14155
0xa91cf9 cp_parser_declaration_seq_opt
../../gcc/cp/parser.c:13943
0xa93675 cp_parser_linkage_specification
../../gcc/cp/parser.c:15319
0xa924da cp_parser_declaration
../../gcc/cp/parser.c:14045
0xa9313c cp_parser_toplevel_declaration
../../gcc/cp/parser.c:14155
0xa9313c cp_parser_translation_unit
../../gcc/cp/parser.c:4940
0xa9313c c_parse_file()
../../gcc/cp/parser.c:45241
0xbb6e7d c_common_parse_file()
../../gcc/c-family/c-opts.c:1218
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
More information about the Gcc-bugs
mailing list