[Bug c/128146] Warn when arithmetic on a bit-field wider than int wraps at the field's width (clang and C++ use the declared type)

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128146

--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> ---
In theory you could ask clang for the similar warning too because it is an
implementation defined.