Index: gcc/testsuite/g++.dg/template/variadic58.C
===================================================================
--- gcc/testsuite/g++.dg/template/variadic58.C	(revision 0)
+++ gcc/testsuite/g++.dg/template/variadic58.C	(revision 0)
@@ -0,0 +1,15 @@
+#include <typeinfo>
+
+template<typename... Args>
+void foo(Args...) { }
+
+template<typename... Args>
+void bar(Args... args) {
+  foo(Args()...);
+  foo(args = args...);
+  foo(reinterpret_cast<void*>(&args)...);
+  foo(const_cast<const Args>(args)...);
+  foo(static_cast<void*>(&args)...);
+  foo(dynamic_cast<void*>(&args)...);
+  foo(typeid(Args)...);
+}
Index: gcc/cp/pt.c
===================================================================
--- gcc/cp/pt.c	(revision 367)
+++ gcc/cp/pt.c	(working copy)
@@ -2389,6 +2389,19 @@
       *walk_subtrees = 0;
       return NULL_TREE;
 
+    case CAST_EXPR:
+      if (TREE_TYPE (t))
+        walk_tree (&TREE_TYPE (t), &find_parameter_packs_r, ppd, ppd->visited);
+
+      {
+        int i;
+        for (i = 0; i < TREE_CODE_LENGTH (TREE_CODE (t)); ++i)
+          walk_tree (&TREE_OPERAND (t, i), &find_parameter_packs_r, 
+                     ppd, ppd->visited);
+      }
+      *walk_subtrees = 0;
+      return NULL_TREE;
+
     default:
       return NULL_TREE;
     }