[Bug libstdc++/116070] [13/14/15 Regression] broken headers for compile with flags -std=gnu++14 -fconcepts

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116070

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|broken headers for compile  |[13/14/15 Regression]
                   |with flags -std=gnu++14     |broken headers for compile
                   |-fconcepts                  |with flags -std=gnu++14
                   |                            |-fconcepts
           Keywords|                            |rejects-valid
      Known to fail|                            |13.3.0, 14.1.0, 15.0
   Target Milestone|---                         |13.4
      Known to work|                            |13.2.0

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm marking this as a rejects-valid regression, but it's debatable whether we
can or even should support this combination of flags.

13.3.0 only has a problem in <bits/stl_bvector.h> and the compiler bug isn't
present on the branch, so that's easy to fix for 13.4.0