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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/106795] New: [13 regression]
 g++.dg/tree-ssa/empty-loop.C fails with excess errors after
 r13-2303-gb911ca4231a366
Date: Wed, 31 Aug 2022 16:44:40 +0000
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X-Bugzilla-Version: 13.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106795

            Bug ID: 106795
           Summary: [13 regression] g++.dg/tree-ssa/empty-loop.C fails
                    with excess errors after r13-2303-gb911ca4231a366
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at gcc dot gnu.org
  Target Milestone: ---

g:b911ca4231a366ddfd026f190b126bd517f4e640, r13-2303-gb911ca4231a366
make  -k check-gcc RUNTESTFLAGS=3D"dg.exp=3Dg++.dg/tree-ssa/empty-loop.C"
FAIL: g++.dg/tree-ssa/empty-loop.C  -std=3Dgnu++17 (test for excess errors)
FAIL: g++.dg/tree-ssa/empty-loop.C  -std=3Dgnu++20 (test for excess errors)
# of expected passes            6
# of unexpected failures        2

Did this test case get missed in the updates?


FAIL: g++.dg/tree-ssa/empty-loop.C  -std=3Dgnu++20 (test for excess errors)
Excess errors:
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/tree-ssa/empty-loop.C:15=
:15:
warning: ignoring return value of 'constexpr std::__cxx11::basic_string<_Ch=
arT,
_Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::length() const [with _CharT =3D char; _Traits =3D std::char_traits=
<char>;
_Alloc =3D std::allocator<char>; size_type =3D long unsigned int]', declare=
d with
attribute 'nodiscard' [-Wunused-result]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/tree-ssa/empty-loop.C:18=
:15:
warning: ignoring return value of 'constexpr std::__cxx11::basic_string<_Ch=
arT,
_Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::length() const [with _CharT =3D char; _Traits =3D std::char_traits=
<char>;
_Alloc =3D std::allocator<char>; size_type =3D long unsigned int]', declare=
d with
attribute 'nodiscard' [-Wunused-result]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/tree-ssa/empty-loop.C:26=
:20:
warning: ignoring return value of 'constexpr std::__cxx11::basic_string<_Ch=
arT,
_Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::length() const [with _CharT =3D char; _Traits =3D std::char_traits=
<char>;
_Alloc =3D std::allocator<char>; size_type =3D long unsigned int]', declare=
d with
attribute 'nodiscard' [-Wunused-result]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/tree-ssa/empty-loop.C:27=
:20:
warning: ignoring return value of 'constexpr std::__cxx11::basic_string<_Ch=
arT,
_Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::length() const [with _CharT =3D char; _Traits =3D std::char_traits=
<char>;
_Alloc =3D std::allocator<char>; size_type =3D long unsigned int]', declare=
d with
attribute 'nodiscard' [-Wunused-result]

commit b911ca4231a366ddfd026f190b126bd517f4e640 (HEAD, refs/bisect/bad)
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Aug 26 16:22:21 2022 +0100

    libstdc++: Add [[nodiscard]] attribute to <string> and <string_view>=