[Bug c++/85205] Optimalisation fails when using a union to allocate space on stack

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85205

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
                 CC|                            |rguenth at gcc dot gnu.org
      Known to work|                            |8.0

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> It is UB, but as extension we try to accept such code as poor man's flexible
> array members.
> This works on the trunk as expected starting with r255775 aka PR77291 fix.

Yeah, it's not a regression so I didn't backport that.