https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105593
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #5)
> (In reply to Richard Biener from comment #4)
> > fails to hide the -Wuninitialized with the C++ frontend, works correct with
> > the C frontend and on the GCC 11 branch.
>
> I also get the warning on the 11 branch. And all the way back to the 4.1
> branch, which is the oldest I have handy; this doesn't seem like a
> regression.
I can confirm that even
void bar (int);
void baz()
{
int u = u;
bar (u);
}
warns with the C++ frontend, so the self-init "trick" to suppress uninit
diagnostics was never implemented in the new parser (it diagnoses with
GCC 3.4 but not with 3.3). So it's kind-of a regression, but ...
