decl.c (gfc_match_derived_decl): Dummy argument cannot be a derived type.

2019-06-15  Steven G. Kargl  <kargl@gcc.gnu.org>

	* decl.c (gfc_match_derived_decl): Dummy argument cannot be a derived
	 type.

2019-06-15  Steven G. Kargl  <kargl@gcc.gnu.org>

	* gfortran.dg/dummy_derived_typed.f90: New test.

From-SVN: r272333

gcc/fortran/ChangeLog

+2019-06-15  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	* decl.c (gfc_match_derived_decl): Dummy argument cannot be a derived
+	type.
+
 2019-06-14  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	* arith.c (arith_power): Rework overflow of an integer to an integer

gcc/fortran/decl.c

@@ -10193,6 +10193,13 @@ gfc_match_derived_decl (void)
       && !gfc_add_function (&gensym->attr, gensym->name, NULL))
     return MATCH_ERROR;
 
+  if (gensym->attr.dummy)
+    {
+      gfc_error ("Dummy argument %qs at %L cannot be a derived type at %C",
+		 name, &gensym->declared_at);
+      return MATCH_ERROR;
+    }
+
   sym = gfc_find_dt_in_generic (gensym);
 
   if (sym && (sym->components != NULL || sym->attr.zero_comp))

gcc/testsuite/ChangeLog

+2019-06-15  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	* gfortran.dg/dummy_derived_typed.f90: New test.
+
 2019-06-15  Jan Hubicka  <hubicka@ucw.cz>
 
 	* gcc.dg/tree-ssa/alias-access-path-2.c: New testcase.

gcc/testsuite/gfortran.dg/dummy_derived_typed.f90

+! { dg-do compile }
+subroutine s(t)   ! { dg-error "Dummy argument" }
+   type t         ! { dg-error "cannot be a derived" }
+   end type       ! { dg-error "Expecting END SUBROUTINE" }
+end