[Bug libstdc++/94744] New: [9 Regression] FAIL: experimental/net/executor/1.cc (test for excess errors)

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94744

            Bug ID: 94744
           Summary: [9 Regression] FAIL: experimental/net/executor/1.cc
                    (test for excess errors)
           Product: gcc
           Version: 9.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---

On Fedora 31, r9-8540 gave

Executing on host:
/export/gnu/import/git/gcc-test-release-1-ia32/bld/./gcc/xg++ -shared-libgcc
-B/export/gnu/import/git/gcc-test-release-1-ia32/bld/./gcc -nostdinc++
-L/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/src
-L/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/src/.libs
-L/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/libsupc++/.libs
-B/usr/9.3.1/i686-linux/bin/ -B/usr/9.3.1/i686-linux/lib/ -isystem
/usr/9.3.1/i686-linux/include -isystem /usr/9.3.1/i686-linux/sys-include
-fchecking=1
-B/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/./libstdc++-v3/src/.libs
-fmessage-length=0 -fno-show-column -ffunction-sections -fdata-sections
-fcf-protection -mshstk -g -O2 -D_GNU_SOURCE -DLOCALEDIR="." -nostdinc++
-I/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/i686-linux
-I/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include
-I/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/libsupc++
-I/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/include/backward
-I/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/util
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc
    -include bits/stdc++.h -fno-diagnostics-show-caret
-fdiagnostics-color=never ./libtestc++.a -Wl,--gc-sections
-L/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/src/filesystem/.libs
 -lm  -o ./1.exe    (timeout = 600)
spawn -ignore SIGHUP
/export/gnu/import/git/gcc-test-release-1-ia32/bld/./gcc/xg++ -shared-libgcc
-B/export/gnu/import/git/gcc-test-release-1-ia32/bld/./gcc -nostdinc++
-L/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/src
-L/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/src/.libs
-L/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/libsupc++/.libs
-B/usr/9.3.1/i686-linux/bin/ -B/usr/9.3.1/i686-linux/lib/ -isystem
/usr/9.3.1/i686-linux/include -isystem /usr/9.3.1/i686-linux/sys-include
-fchecking=1
-B/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/./libstdc++-v3/src/.libs
-fmessage-length=0 -fno-show-column -ffunction-sections -fdata-sections
-fcf-protection -mshstk -g -O2 -D_GNU_SOURCE -DLOCALEDIR="." -nostdinc++
-I/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/i686-linux
-I/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include
-I/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/libsupc++
-I/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/include/backward
-I/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/util
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc
-include bits/stdc++.h -fno-diagnostics-show-caret -fdiagnostics-color=never
./libtestc++.a -Wl,--gc-sections
-L/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/src/filesystem/.libs
-lm -o ./1.exe
In file included from
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:20:
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/experimental/executor:
In instantiation of '_Executor* std::experimental::net::v1::executor::target()
[with _Executor = test02()::E]':
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:71:
  required from here
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/experimental/executor:1112:
error: no matching function for call to 'test02()::E::E(const void*&)'
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:45:
note: candidate: 'constexpr test02()::E::E(const test02()::E&)'
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:45:
note:   no known conversion for argument 1 from 'const void*' to 'const
test02()::E&'
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:45:
note: candidate: 'constexpr test02()::E::E(test02()::E&&)'
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:45:
note:   no known conversion for argument 1 from 'const void*' to
'test02()::E&&'
In file included from
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:20:
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/experimental/executor:
In instantiation of '_Executor* std::experimental::net::v1::executor::target()
[with _Executor = const test02()::E]':
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:72:
  required from here
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/experimental/executor:1112:
error: no matching function for call to 'test02()::E::E(const void*&)'
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:45:
note: candidate: 'constexpr test02()::E::E(const test02()::E&)'
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:45:
note:   no known conversion for argument 1 from 'const void*' to 'const
test02()::E&'
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:45:
note: candidate: 'constexpr test02()::E::E(test02()::E&&)'
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:45:
note:   no known conversion for argument 1 from 'const void*' to
'test02()::E&&'
In file included from
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:20:
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/experimental/executor:
In instantiation of 'struct
std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >':
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/type_traits:1320:
  required by substitution of 'template<class _From1, class _To1, class> static
std::true_type
std::__is_convertible_helper<std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >*, std::experimental::net::v1::executor::_Tgt*,
false>::__test<_From1, _To1, <template-parameter-1-3> >(int) [with _From1 =
std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >*; _To1 = std::experimental::net::v1::executor::_Tgt*;
<template-parameter-1-3> = <missing>]'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/type_traits:1329:
  required from 'struct
std::__is_convertible_helper<std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >*, std::experimental::net::v1::executor::_Tgt*, false>'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/type_traits:1335:
  required from 'struct
std::is_convertible<std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >*, std::experimental::net::v1::executor::_Tgt*>'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/shared_ptr_base.h:927:
  required from 'struct
std::__sp_compatible_with<std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >*, std::experimental::net::v1::executor::_Tgt*>'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/shared_ptr_base.h:1094:
  [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to
disable ]
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/type_traits:883:
  required from 'struct
std::is_constructible<std::__shared_ptr<std::experimental::net::v1::executor::_Tgt,
__gnu_cxx::_S_atomic>, const
std::shared_ptr<std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> > >&>'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/shared_ptr.h:106:
  required by substitution of 'template<class _Tp> template<class ... _Args>
using _Constructible = typename
std::enable_if<std::is_constructible<std::__shared_ptr<_Tp>, _Args
...>::value>::type [with _Args = {const
std::shared_ptr<std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> > >&}; _Tp = std::experimental::net::v1::executor::_Tgt]'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/shared_ptr.h:245:
  required by substitution of 'template<class _Yp, class>
std::shared_ptr<std::experimental::net::v1::executor::_Tgt>::shared_ptr(const
std::shared_ptr<_Tp>&) [with _Yp =
std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >; <template-parameter-1-2> = <missing>]'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/experimental/executor:1200:
  required from 'std::shared_ptr<std::experimental::net::v1::executor::_Tgt>
std::experimental::net::v1::executor::_M_create(_Ex&&, const _Alloc&) [with _Ex
= test02()::E; _Alloc = std::allocator<void>]'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/experimental/executor:1002:
  required from 'std::experimental::net::v1::executor::executor(_Executor)
[with _Executor = test02()::E]'
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:62:
  required from here
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/experimental/executor:1170:
error: conflicting return type specified for 'const void*
std::experimental::net::v1::executor::_TgtImpl<_Ex, _Alloc>::target(const
std::type_info&) const [with _Ex = test02()::E; _Alloc = std::allocator<void>]'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/experimental/executor:1138:
note: overridden function is 'virtual void*
std::experimental::net::v1::executor::_Tgt::target(const std::type_info&)
const'
In file included from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/string:41,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/locale_classes.h:40,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/ios_base.h:41,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/ios:42,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/istream:38,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/sstream:38,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/complex:45,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/ccomplex:39,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/i686-linux/bits/stdc++.h:54,
                 from <command-line>:
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/allocator.h:
In instantiation of 'void std::allocator<void>::construct(_Up*, _Args&& ...)
[with _Up = std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >; _Args = {test02()::E, const std::allocator<void>&}]':
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/alloc_traits.h:482:
  required from 'static void std::allocator_traits<std::allocator<_CharT>
>::construct(std::allocator_traits<std::allocator<_CharT> >::allocator_type&,
_Up*, _Args&& ...) [with _Up =
std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >; _Args = {test02()::E, const std::allocator<void>&}; _Tp
= void; std::allocator_traits<std::allocator<_CharT> >::allocator_type =
std::allocator<void>]'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/shared_ptr_base.h:548:
  required from 'std::_Sp_counted_ptr_inplace<_Tp, _Alloc,
_Lp>::_Sp_counted_ptr_inplace(_Alloc, _Args&& ...) [with _Args = {test02()::E,
const std::allocator<void>&}; _Tp =
std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >; _Alloc = std::allocator<void>; __gnu_cxx::_Lock_policy
_Lp = __gnu_cxx::_S_atomic]'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/shared_ptr_base.h:679:
  required from 'std::__shared_count<_Lp>::__shared_count(_Tp*&,
std::_Sp_alloc_shared_tag<_Alloc>, _Args&& ...) [with _Tp =
std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >; _Alloc = std::allocator<void>; _Args = {test02()::E,
const std::allocator<void>&}; __gnu_cxx::_Lock_policy _Lp =
__gnu_cxx::_S_atomic]'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/shared_ptr_base.h:1344:
  required from 'std::__shared_ptr<_Tp,
_Lp>::__shared_ptr(std::_Sp_alloc_shared_tag<_Tp>, _Args&& ...) [with _Alloc =
std::allocator<void>; _Args = {test02()::E, const std::allocator<void>&}; _Tp =
std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/shared_ptr.h:359:
  required from
'std::shared_ptr<_Tp>::shared_ptr(std::_Sp_alloc_shared_tag<_Tp>, _Args&& ...)
[with _Alloc = std::allocator<void>; _Args = {test02()::E, const
std::allocator<void>&}; _Tp =
std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >]'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/shared_ptr.h:701:
  required from 'std::shared_ptr<_Tp> std::allocate_shared(const _Alloc&,
_Args&& ...) [with _Tp =
std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >; _Alloc = std::allocator<void>; _Args = {test02()::E,
const std::allocator<void>&}]'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/experimental/executor:1199:
  required from 'std::shared_ptr<std::experimental::net::v1::executor::_Tgt>
std::experimental::net::v1::executor::_M_create(_Ex&&, const _Alloc&) [with _Ex
= test02()::E; _Alloc = std::allocator<void>]'
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/experimental/executor:1002:
  required from 'std::experimental::net::v1::executor::executor(_Executor)
[with _Executor = test02()::E]'
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:62:
  required from here
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/allocator.h:91:
error: invalid new-expression of abstract class type
'std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >'
In file included from
/export/gnu/import/git/gcc-test-release-1-ia32/src-9/libstdc++-v3/testsuite/experimental/net/executor/1.cc:20:
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/experimental/executor:1145:
note:   because the following virtual functions are pure within
'std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >':
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/experimental/executor:1139:
note:    'virtual bool
std::experimental::net::v1::executor::_Tgt::_M_equals(std::experimental::net::v1::executor::_Tgt*)
const'
In file included from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/ext/alloc_traits.h:36,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/basic_string.h:40,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/string:55,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/locale_classes.h:40,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/ios_base.h:41,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/ios:42,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/istream:38,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/sstream:38,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/complex:45,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/ccomplex:39,
                 from
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/i686-linux/bits/stdc++.h:54,
                 from <command-line>:
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/alloc_traits.h:482:
error: 'static void std::allocator_traits<std::allocator<_CharT>
>::construct(std::allocator_traits<std::allocator<_CharT> >::allocator_type&,
_Up*, _Args&& ...) [with _Up =
std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >; _Args = {test02()::E, const std::allocator<void>&}; _Tp
= void; std::allocator_traits<std::allocator<_CharT> >::allocator_type =
std::allocator<void>]', declared using local type 'test02()::E', is used but
never defined [-fpermissive]
/export/gnu/import/git/gcc-test-release-1-ia32/bld/i686-linux/libstdc++-v3/include/bits/alloc_traits.h:482:
warning: 'static void std::allocator_traits<std::allocator<_CharT>
>::construct(std::allocator_traits<std::allocator<_CharT> >::allocator_type&,
_Up*, _Args&& ...) noexcept (false) [with _Up =
std::experimental::net::v1::executor::_TgtImpl<test02()::E,
std::allocator<void> >; _Args = {test02()::E, const std::allocator<void>&}; _Tp
= void]' used but never defined
compiler exited with status 1
FAIL: experimental/net/executor/1.cc (test for excess errors)

r9-8527 is OK.