re PR c++/45473 (ICE: in dfs_walk_once, at cp/search.c:1659)

	PR c++/45473
	* search.c (look_for_overrides): A constructor is never virtual.

From-SVN: r166391

gcc/cp/ChangeLog

+2010-11-05  Jason Merrill  <jason@redhat.com>
+
+	PR c++/45473
+	* search.c (look_for_overrides): A constructor is never virtual.
+
 2010-11-05  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/46160

gcc/cp/search.c

@@ -1935,6 +1935,11 @@ look_for_overrides (tree type, tree fndecl)
   int ix;
   int found = 0;
 
+  /* A constructor for a class T does not override a function T
+     in a base class.  */
+  if (DECL_CONSTRUCTOR_P (fndecl))
+    return 0;
+
   for (ix = 0; BINFO_BASE_ITERATE (binfo, ix, base_binfo); ix++)
     {
       tree basetype = BINFO_TYPE (base_binfo);

gcc/testsuite/ChangeLog

+2010-11-05  Jason Merrill  <jason@redhat.com>
+
+	PR c++/45473
+	* g++.dg/inherit/virtual6.C: New.
+
 2010-11-05  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c/44772

gcc/testsuite/g++.dg/inherit/virtual6.C

+// PR c++/45473
+
+struct A
+{
+  virtual void B ();
+};
+
+struct B : A
+{
+  B ();
+};
+
+struct C : B
+{
+};