2007-11-20  Jakub Jelinek  <jakub@redhat.com>

	PR c++/33962

	* pt.c (more_specialized_fn): Don't segfault if one or

	both argument list end with ellipsis.

	* g++.dg/overload/template3.C: New test.

--- gcc/cp/pt.c	(revision 130307)

+++ gcc/cp/pt.c	(revision 130308)

@@ -13523,6 +13523,10 @@ more_specialized_fn (tree pat1, tree pat

       args1 = TREE_CHAIN (args1);

       args2 = TREE_CHAIN (args2);

+

+      /* Stop when an ellipsis is seen.  */

+      if (args1 == NULL_TREE || args2 == NULL_TREE)

+	break;

     }

   processing_template_decl--;

--- gcc/testsuite/g++.dg/overload/template3.C	(revision 0)

+++ gcc/testsuite/g++.dg/overload/template3.C	(revision 130308)

@@ -0,0 +1,15 @@

+// PR c++/33962

+// { dg-do compile }

+

+template <class T> struct A;

+

+template <class U> void foo (const U &x, ...);

+template <class T> void foo (const A<T> &x, ...);

+

+void bar (const A<int> &x, const char *y)

+{

+  foo (x, y);

+}

+

+/* { dg-final { scan-assembler "_Z3fooIiEvRK1AIT_Ez" } } */

+/* { dg-final { scan-assembler-not "_Z3fooI1AIiEEvRKT_z" } } */