re PR c++/27492 (ICE on invalid covariant return type)

2007-01-23  Simon Martin  <simartin@users.sourceforge.net>

	PR c++/27492
	* decl.c (duplicate_decls): Don't reset DECL_INVALID_OVERRIDER_P for
	function decls.

From-SVN: r121089

gcc/cp/ChangeLog

+2007-01-23  Simon Martin  <simartin@users.sourceforge.net>
+
+	PR c++/27492
+	* decl.c (duplicate_decls): Don't reset DECL_INVALID_OVERRIDER_P for
+	function decls.
+
 2007-01-23  Ian Lance Taylor  <iant@google.com>
 
 	* typeck.c (convert_for_assignment): Only warn about a = b = c

gcc/cp/decl.c

@@ -1576,6 +1576,7 @@ duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
       DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
       DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
       DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
+      DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
       DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
       if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
 	SET_OVERLOADED_OPERATOR_CODE

gcc/testsuite/ChangeLog

+2007-01-23  Simon Martin  <simartin@users.sourceforge.net>
+
+	PR c++/27492
+	* g++.dg/inherit/covariant15.C: New test.
+
 2007-01-23  Ian Lance Taylor  <iant@google.com>
 
 	* g++.dg/warn/Wparentheses-24.C: New test.

gcc/testsuite/g++.dg/inherit/covariant15.C

+/* This used to ICE (PR c++/27492) */
+/* { dg-do "compile" } */
+
+struct A {};
+
+class B : A
+{
+    virtual A* foo(); /* { dg-error "overriding" } */
+};
+
+struct C : virtual B
+{
+    virtual C* foo(); /* { dg-error "invalid covariant return type" } */
+};
+
+C* C::foo() { return 0; }
+
+struct D : C {};