[Bug c++/61867] gcc can't detect obviously false test

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61867

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Indeed we don't want to warn here.  The knowledge is spread across two
different
statements and that's already too far for this kind of thing.

Remember we just "weakened" the transposed memset arg warning to not warn
about

n = 0;
memset (p, 'x', n);

but only about

memset (p, 'x', 0);