[Bug lto/89358] [7/8/9 Regression] Combining -std=c++14 and -std=c++17 objects gives ODR warnings

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89358

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fdumont at gcc dot gnu.org
      Known to work|                            |6.4.0
            Summary|Combining -std=c++14 and    |[7/8/9 Regression]
                   |-std=c++17 objects gives    |Combining -std=c++14 and
                   |ODR warnings                |-std=c++17 objects gives
                   |                            |ODR warnings
      Known to fail|                            |7.3.0, 8.2.0, 9.0

--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
I see it starting with r243379, would it be possible culprit of that?