[Bug testsuite/106795] New: [13 regression] g++.dg/tree-ssa/empty-loop.C fails with excess errors after r13-2303-gb911ca4231a366

[seurer at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106795

            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="dg.exp=g++.dg/tree-ssa/empty-loop.C"
FAIL: g++.dg/tree-ssa/empty-loop.C  -std=gnu++17 (test for excess errors)
FAIL: g++.dg/tree-ssa/empty-loop.C  -std=gnu++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=gnu++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<_CharT,
_Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>;
_Alloc = std::allocator<char>; size_type = long unsigned int]', declared 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<_CharT,
_Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>;
_Alloc = std::allocator<char>; size_type = long unsigned int]', declared 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<_CharT,
_Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>;
_Alloc = std::allocator<char>; size_type = long unsigned int]', declared 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<_CharT,
_Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>;
_Alloc = std::allocator<char>; size_type = long unsigned int]', declared 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>