https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127469
--- Comment #2 from Gaius Mulley <gaius at gcc dot gnu.org> ---
When the following patch is applied gm2 now emits this message:
$ gm2 constaggregate.mod
constaggregate.mod:12:6: error: the type of the constant declaration ‘cls’
cannot be determined
12 | cls = CallType { "cls", "callstring" };
| ^~~
constaggregate.mod:12:12: error: In program module ‘VT100Test’: the constructor
type before the opening { is unknown
12 | cls = CallType { "cls", "callstring" };
| ^~~~~~~~