Compiler warning in xdisp.c

Compiler warning in xdisp.c

[Po Lu]

Compiling master, I get:

In file included from composite.h:29,
                 from xdisp.c:441:
xdisp.c: In function ‘produce_stretch_glyph’:
dispextern.h:1891:10: warning: ‘face’ may be used uninitialized in this function [-Wmaybe-uninitialized]
 1891 |   return face_for_char (f, face, character, pos, object);
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xdisp.c:30063:16: note: ‘face’ was declared here
30063 |   struct face *face;
      |                ^~~~

I'm not comfortable enough with that code to fix it.  The problem may
also exist in Emacs 28.  Thanks.

Re: Compiler warning in xdisp.c

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Date: Tue, 23 Nov 2021 17:50:47 +0800
> 
> In file included from composite.h:29,
>                  from xdisp.c:441:
> xdisp.c: In function ‘produce_stretch_glyph’:
> dispextern.h:1891:10: warning: ‘face’ may be used uninitialized in this function [-Wmaybe-uninitialized]
>  1891 |   return face_for_char (f, face, character, pos, object);
>       |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> xdisp.c:30063:16: note: ‘face’ was declared here
> 30063 |   struct face *face;
>       |                ^~~~

A bogus warning, which should be fixed now (on the release branch;
soon on master).  Meanwhile, you can safely disregard it.