Re: (select-window nil) crash with gcc-8.2.0

[Paul Eggert]

Richard Stallman wrote:
>    >https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90020
>
> Thank you.
>
> It is very very important to report the bugs we find in other
> programs, both GNU packages and others.

Yes, a bug was going to be reported one way or another, by Madhu or by me. This 
test case seems to have uncovered two GCC bugs, one introduced in GCC 4.9.x in 
2014, and one that seems to predate that. Richard Biener is testing an overall 
patch.

I considered putting something into etc/PROBLEMS warning people not to compile 
Emacs with gcc -O2 -Os, but apparently that sort of GCC usage is pretty rare so 
it's not clear it's worth documenting it (plus, the advice is not specific to 
Emacs).