https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113492
uecker at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |uecker at gcc dot gnu.org --- Comment #2 from uecker at gcc dot gnu.org --- I agree that "int:3" with -funsigned-bitfields should produce a type which is compatible to one with "unsigned:3" and that forming a composite type has to work. I am not entirely sure this should be considered a regression as this C23 feature did not exist before (but was rejected and did not ICE). Anyway, I will look at this and post a patch. Thanks for reporting.