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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/94971] New: [10/11 Regression] Parallel Mode cannot
 be used in C++20
Date: Wed, 06 May 2020 10:23:52 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94971

            Bug ID: 94971
           Summary: [10/11 Regression] Parallel Mode cannot be used in
                    C++20
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: redi at gcc dot gnu.org
  Target Milestone: ---

This fails to compile in C++20 mode:

#define _GLIBCXX_PARALLEL 1
#include <algorithm>

The new std::lexicographical_compare_three_way algo I added is in the wrong
namespace.=