[Bug libstdc++/107720] New: [13 regression] New C++ library test cases (and many others) in r13-3936-g1d9454aba615ea fail

[seurer at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107720

            Bug ID: 107720
           Summary: [13 regression] New C++ library test cases (and many
                    others) in r13-3936-g1d9454aba615ea fail
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at gcc dot gnu.org
  Target Milestone: ---

g:1d9454aba615eadd0d85c93713dd848227345f67, r13-3936-g1d9454aba615ea

This was on a make check of a simple (non-bootstrap) built compiler.  I only
see this on one system.

Ubuntu 22.04.1 LTS
gcc version 11.2.0 (Ubuntu 11.2.0-19ubuntu1) 


FAIL: 17_intro/headers/c++2020/all_attributes.cc (test for excess errors)
FAIL: 17_intro/headers/c++2020/all_no_exceptions.cc (test for excess errors)
FAIL: 17_intro/headers/c++2020/all_no_rtti.cc (test for excess errors)
FAIL: 17_intro/headers/c++2020/all_pedantic_errors.cc (test for excess errors)
FAIL: 17_intro/headers/c++2020/operator_names.cc (test for excess errors)
FAIL: 17_intro/headers/c++2020/stdc++.cc (test for excess errors)
FAIL: 17_intro/headers/c++2020/stdc++_multiple_inclusion.cc (test for excess
errors)
FAIL: std/format/arguments/args.cc (test for excess errors)
FAIL: std/format/error.cc (test for excess errors)
FAIL: std/format/formatter.cc (test for excess errors)
FAIL: std/format/functions/format.cc (test for excess errors)
FAIL: std/format/functions/format_to_n.cc (test for excess errors)
FAIL: std/format/functions/size.cc (test for excess errors)
FAIL: std/format/functions/vformat_to.cc (test for excess errors)
FAIL: std/format/parse_ctx.cc (test for excess errors)
FAIL: std/format/string.cc (test for excess errors)
FAIL: std/format/string_neg.cc (test for excess errors)


FAIL: 17_intro/headers/c++2020/all_no_exceptions.cc (test for excess errors)
Excess errors:
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:2566:
error: '_Args_next_value_' was not declared in this scope; did you mean
'_Arg_next_value_'?
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:2903:
error: expected ';' before 'else'
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:2906:
error: expected ';' before 'else'
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:2999:
error: duplicate case value
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:3019:
error: duplicate case value
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:2999:
error: duplicate case value
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:3019:
error: duplicate case value
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:1421:
error: call of overloaded 'to_chars(char*&, char*&, __ieee128&,
std::chars_format&, std::size_t&)' is ambiguous
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:1423:
error: call of overloaded 'to_chars(char*&, char*&, __ieee128&,
std::chars_format&)' is ambiguous
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:1425:
error: call of overloaded 'to_chars(char*&, char*&, __ieee128&)' is ambiguous
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:1421:
error: call of overloaded 'to_chars(char*&, char*&, __ieee128&,
std::chars_format&, std::size_t&)' is ambiguous
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:1423:
error: call of overloaded 'to_chars(char*&, char*&, __ieee128&,
std::chars_format&)' is ambiguous
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:1425:
error: call of overloaded 'to_chars(char*&, char*&, __ieee128&)' is ambiguous
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:2999:
error: duplicate case value
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:3019:
error: duplicate case value
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:2999:
error: duplicate case value
/home/seurer/gcc/git/build/gcc-test2/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/format:3019:
error: duplicate case value


commit 1d9454aba615eadd0d85c93713dd848227345f67 (HEAD, refs/bisect/bad)
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Tue Oct 18 21:20:06 2022 +0100

    libstdc++: Implement C++20 <format> [PR104166]