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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/90043] Turn on -Winit-self by default for
 -Wuninitialized
Date: Tue, 13 Apr 2021 19:55:59 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D90043

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2019-09-29 00:00:00         |2021-4-13
             Blocks|                            |24639

--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
No progress in GCC 11 (my bad).  I'll see if I can remember for GCC 12.  Be=
low
is a C test case (in C++ the warning is included in -Wall).

$ (set -x && cat pr90043.c && gcc -S -Wall -Wextra -Wpedantic pr90043.c && =
gcc
-S -Wall -Wextra -Wpedantic -Winit-self pr90043.c)
+ cat pr90043.c
int f (void)
{
  int i =3D i;
  return i;
}
+ gcc -S -Wall -Wextra -Wpedantic pr90043.c
+ gcc -S -Wall -Wextra -Wpedantic -Winit-self pr90043.c
pr90043.c: In function =E2=80=98f=E2=80=99:
pr90043.c:3:7: warning: =E2=80=98i=E2=80=99 is used uninitialized [-Wuninit=
ialized]
    3 |   int i =3D i;
      |       ^
pr90043.c:3:7: note: =E2=80=98i=E2=80=99 was declared here
    3 |   int i =3D i;
      |       ^


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D24639
[Bug 24639] [meta-bug] bug to track all Wuninitialized issues=