[Bug middle-end/61409] [4.9/4.10 regression] -Wmaybe-uninitialized false-positive with -O2

[eggert at gnu dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61409

--- Comment #3 from Paul Eggert <eggert at gnu dot org> ---
(In reply to Manuel López-Ibáñez from comment #1)

> My guess is that what is uninitialized is "rw" and some optimization pass
> messed up the variable names when creating temporaries.

I'm afraid it's more serious than that, because 'rw = XWINDOW (make_window
());' always initializes 'rw'.

Thanks for simplifying the test case.