http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57966
--- Comment #7 from janus at gcc dot gnu.org --- The following patch fixes both variants (comment 1 and comment 5): Index: gcc/fortran/resolve.c =================================================================== --- gcc/fortran/resolve.c (revision 201238) +++ gcc/fortran/resolve.c (working copy) @@ -5686,7 +5686,9 @@ resolve_compcall (gfc_expr* e, const char **name) } +static bool resolve_fl_derived (gfc_symbol *sym); + /* Resolve a typebound function, or 'method'. First separate all the non-CLASS references by calling resolve_compcall directly. */ @@ -5772,6 +5774,9 @@ resolve_typebound_function (gfc_expr* e) /* Get the CLASS declared type. */ declared = get_declared_from_expr (&class_ref, &new_ref, e, true); + + if (!resolve_fl_derived (declared)) + return false; /* Weed out cases of the ultimate component being a derived type. */ if ((class_ref && class_ref->u.c.component->ts.type == BT_DERIVED) The problem was actually that the TBP was not properly resolved (or more precisely: that the resolution came too late), so that the FUNCTION attribute was not yet set. Regtesting now ...