[Bug c/100353] [11/12 Regression] Accepts invalid label

[harald at gigawatt dot nl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100353

Harald van Dijk <harald at gigawatt dot nl> changed:

           What    |Removed                     |Added
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                 CC|                            |harald at gigawatt dot nl

--- Comment #1 from Harald van Dijk <harald at gigawatt dot nl> ---
This was intentional, this will become valid C so this is now only diagnosed
with -pedantic and only in modes before C2x:
https://gcc.gnu.org/onlinedocs/gcc/Mixed-Labels-and-Declarations.html