[Bug c/89888] When switch controlling expression is promoted from type narrower than int, GCC does not diagnose identical cases

[pascal_cuoq at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89888

--- Comment #1 from Pascal Cuoq <pascal_cuoq at hotmail dot com> ---
errata: “outside the range of an unsigned char”