When the input grammar line is too long, it is cut rather than issuing an error:
740 -- directive : | ABSTRACT_t | CDECL_t | DISPID_t | EXPORT_t | LOCAL_t | MESSAGE_t constant | OVERLOAD_t | PASCAL_t | PUBLISHED_t | READ_t | READONLY_t | REGISTER_t | REINTRODUCE_t | REQUIRES_t | RESIDENT_t | SAFECALL_t | STDCALL_t | STORED_t | VARARGS_t | WRI
741 TE_t | WRITEONLY_t;
-----^
Ayacc: Expecting a colon after the LHS of the rule
HTH, Blady.