New tests.

From-SVN: r128432

gcc/testsuite/gnat.dg/discr_test2.adb

+--  { dg-do compile }
+
+procedure Discr_Test2 is
+   type Ptr is access all integer;
+   type Ar is array (Integer range <>) of Ptr;
+        
+   type Inner (Discr : Integer) is record
+      Comp : Ar (1..Discr);
+   end record;
+
+   type Wrapper (Discr : Integer) is record
+      Comp :  Inner (Discr);
+   end record;
+
+   Val  : constant Wrapper := (0, Comp => <>);
+begin
+   null;
+end;

gcc/testsuite/gnat.dg/regpat1.adb

+--  { dg-do run }
+
+with GNAT.Regpat; use GNAT.Regpat;
+procedure regpat1 is
+begin
+   declare
+      Re : Pattern_Matcher := Compile ("a[]b");
+   begin
+      raise Program_Error;
+   end;
+exception
+   when Expression_Error => null;
+end regpat1;

gcc/testsuite/gnat.dg/specs/box1.ads

+--  { dg-do compile }
+
+package box1 is
+  type Root is tagged null record;
+  type Der1 is new Root with record
+     B : Boolean;
+  end record;
+  
+  type Der2 is new Der1 with null record;
+  type Der3 is new Der2 with null record;
+  
+  Obj : Der3 := (Der2 with others => <>);
+end;