[Bug c/111526] inconsistent handling of declaration after label

[P at draigBrady dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111526

--- Comment #3 from Pádraig Brady <P at draigBrady dot com> ---
Created attachment 55964
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55964&action=edit
coreutils tail.c compilation unit

This should warn with -Wpedantic, but doesn't on gcc 13