http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59228
--- Comment #3 from janus at gcc dot gnu.org --- The trivial fix is: Index: gcc/fortran/interface.c =================================================================== --- gcc/fortran/interface.c (revision 204922) +++ gcc/fortran/interface.c (working copy) @@ -2092,7 +2092,7 @@ compare_parameter (gfc_symbol *formal, gfc_expr *a && (actual->symtree->n.sym->attr.asynchronous || actual->symtree->n.sym->attr.volatile_) && (formal->attr.asynchronous || formal->attr.volatile_) - && actual->rank && !gfc_is_simply_contiguous (actual, true) + && actual->rank && formal->as && !gfc_is_simply_contiguous (actual, true) && ((formal->as->type != AS_ASSUMED_SHAPE && formal->as->type != AS_ASSUMED_RANK && !formal->attr.pointer) || formal->attr.contiguous))