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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/98630] Seg-fault when using a goto after condition (if)
Date: Tue, 12 Jan 2021 10:16:54 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98630

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For goto crossing initialization, C++ makes it a hard error and C only has a
non-default warning (not even in -W), -Wjump-misses-init included in
-Wc++-compat.
As can be seen on:
int
foo (void)
{
  goto a;
  int b =3D 1;
a:
  b++;
  return b;
}

int
bar (void)
{
  goto a;
  {
    int b =3D 1;
  a:
    b++;
    return b;
  }
}

int
baz (void)
{
  {
    int b =3D 1;
    if (1)
      ;
    else
      {
      a:
        b++;
        return b;
      }
  }
  goto a;
}

with g++ or gcc -Wjump-misses-init=