[Bug other/103681] Unusual behavior for tail padding with different c++ standards

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103681

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |blocker
           Keywords|                            |ABI, wrong-code
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-12-13
      Known to fail|                            |12.0
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.

Some more information from 
Jonathan Wakely:
The C++14 behaviour started with r216750

   Implement N3653 (Member initializers and aggregates) and fix
references to 'this' in constexpr cons
tructors.

           Implement N3653 (Member initializers and aggregates) and fix
           references to 'this' in constexpr constructors.
           * class.c (check_field_decls): In C++14 an NSDMI does not make the
           class non-aggregate.

But I think the layout should be using "POD for the purpose of
layout", which means the C++98 POD rules. Please do report it to
bugzilla.