https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84720
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- clang++ accepts this. In tsubst_function_decl we set DECL_CONTEXT to error_mark_node as that is what 12520 if (member && !closure) 12521 ctx = tsubst_aggr_type (ctx, args, 12522 complain, t, /*entering_scope=*/1); returns (complain is tf_none), returning error_mark_node here if ctx is error_mark_node doesn't help, it ICEs later on elsewhere.