https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82768
Casey Carter <Casey at Carter dot net> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |Casey at Carter dot net --- Comment #2 from Casey Carter <Casey at Carter dot net> --- (In reply to Martin Liška from comment #1) > Confirmed on all release that support -fconcepts. Is it a valid code? No. Using a placeholder type for the parameter of a requires expression is not supported. (Specifically, the Addressable parameter in the definition of InternalCompilerError.)