Tony wrote:
> I noticed this in a "make reconfig" at patchlevel 9.0.1429. It may or
> may not have happened earlier. Builds without expression evaluation
> are not affected.
>
> The following is from a Normal build without the -j argument to make,
> to avoid line-interlacing from builds of different modules:
>
> gcc -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_GTK
> -I/usr/include/gtk-3.0 -I/usr/include/pango-1.0
> -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include
> -I/usr/include/harfbuzz -I/usr/include/freetype2
> -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi
> -I/usr/include/cairo -I/usr/include/libpng16 -I/usr/include/pixman-1
> -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/gio-unix-2.0
> -I/usr/include/wayland -I/usr/include/libxkbcommon
> -I/usr/include/atk-1.0 -I/usr/include/at-spi2-atk/2.0
> -I/usr/include/at-spi-2.0 -I/usr/include/dbus-1.0
> -I/usr/lib64/dbus-1.0/include -pthread -O2 -fno-strength-reduce
> -Wall -Wno-deprecated-declarations -D_REENTRANT -U_FORTIFY_SOURCE
> -D_FORTIFY_SOURCE=1 -o objects/memline.o memline.c
> memline.c: In function ‘adjust_text_props_for_delete’:
> memline.c:3623:43: warning: ‘this_props_len’ may be used uninitialized
> [-Wmaybe-uninitialized]
> 3623 | for (done_this = 0; done_this < this_props_len;
> | ~~~~~~~~~~^~~~~~~~~~~~~~~~
I cannot make this warning show up. I did add the "-O2" argument to
gcc, that usually reveals these "may be used uninitialized" warnings.
I assume you use a different version of gcc. I'm afraid I cannot guess
what would be the best way to get rid of these warnings. It looks like
the optimizer doesn't see that "did_get_line" is FALSE at first and the
block that sets the variables will always be executed before they are
used.
Can someone reproduce the warning and come up with a reasonable solution?
I don't think initializing the variables is a good solution, that should
not be necessary.
--
CUSTOMER: Well, can you hang around a couple of minutes? He won't be
long.
MORTICIAN: Naaah, I got to go on to Robinson's -- they've lost nine today.
CUSTOMER: Well, when is your next round?
MORTICIAN: Thursday.
DEAD PERSON: I think I'll go for a walk.
The Quest for the Holy Grail (Monty Python)
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