re PR fortran/88138 (ICE in gfc_arith_concat, at fortran/arith.c:1007)

2019-12-15  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/88138
	* decl.c (variable_decl): Check that a derived isn't being assigned
	an incompatible entity in an initialization.
 
2019-12-15  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/88138
	* gfortran.dg/pr88138.f90: new test.

From-SVN: r267177

gcc/fortran/ChangeLog

+2019-12-15  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/88138
+	* decl.c (variable_decl): Check that a derived isn't being assigned
+	an incompatible entity in an initialization.
+ 
 2018-12-12  Jakub Jelinek  <jakub@redhat.com>
 
 	PR fortran/88463

gcc/fortran/decl.c

@@ -2784,6 +2784,22 @@ variable_decl (int elem)
 	param->value = gfc_copy_expr (initializer);
     }
 
+  /* Before adding a possible initilizer, do a simple check for compatibility
+     of lhs and rhs types.  Assigning a REAL value to a derive type is not a
+     good thing.  */
+  if (current_ts.type == BT_DERIVED && initializer
+      && (gfc_numeric_ts (&initializer->ts)
+	  || initializer->ts.type == BT_LOGICAL
+	  || initializer->ts.type == BT_CHARACTER))
+    {
+      gfc_error ("Incompatible initialization between a derive type "
+		 "entity and an entity with %qs type at %C",
+		  gfc_typename (&initializer->ts));
+      m = MATCH_ERROR;
+      goto cleanup;
+    }
+
+
   /* Add the initializer.  Note that it is fine if initializer is
      NULL here, because we sometimes also need to check if a
      declaration *must* have an initialization expression.  */

gcc/testsuite/ChangeLog

+2019-12-15  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/88138
+	* gfortran.dg/pr88138.f90: new test.
+
 2018-12-15  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/88464

gcc/testsuite/gfortran.dg/pr88138.f90

+! { dg-do compile }
+program p
+   type t
+      character :: c = 'c'
+   end type
+   type(t), parameter :: x  = 1.e1  ! { dg-error "Incompatible initialization between a" }s
+   print *, 'a' // x%c
+end
+! { dg-prune-output "has no IMPLICIT type" }