re PR c++/47022 (ICE: in tsubst_copy, at cp/pt.c:11682)

	PR c++/47022
	* pt.c (tsubst_copy_and_build): Use tsubst instead of tsubst_copy
	for the second build_x_va_arg argument.

	* g++.dg/template/stdarg1.C: New test.

From-SVN: r168564

gcc/cp/ChangeLog

+2011-01-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/47022
+	* pt.c (tsubst_copy_and_build): Use tsubst instead of tsubst_copy
+	for the second build_x_va_arg argument.
+
 2011-01-05  Tom Tromey  <tromey@redhat.com>
 
 	* typeck.c (cp_build_addr_expr_1): Update call to lvalue_error.

gcc/cp/pt.c

@@ -13239,8 +13239,7 @@ tsubst_copy_and_build (tree t,
 
     case VA_ARG_EXPR:
       return build_x_va_arg (RECUR (TREE_OPERAND (t, 0)),
-			     tsubst_copy (TREE_TYPE (t), args, complain,
-					  in_decl));
+			     tsubst (TREE_TYPE (t), args, complain, in_decl));
 
     case OFFSETOF_EXPR:
       return finish_offsetof (RECUR (TREE_OPERAND (t, 0)));

gcc/testsuite/ChangeLog

+2011-01-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/47022
+	* g++.dg/template/stdarg1.C: New test.
+
 2011-01-06  Daniel Franke  <franke.daniel@gmail.com>
 
 	PR fortran/47195

gcc/testsuite/g++.dg/template/stdarg1.C

+// PR c++/47022
+// { dg-do compile }
+
+#include <cstdarg>
+
+template <typename T>
+void
+f1 (T *p, va_list ap)
+{
+  *p = va_arg (ap, long double);
+  *p += va_arg (ap, double);
+}
+
+template <typename T>
+void
+f2 (T *p, va_list ap)
+{
+  *p = __real__ va_arg (ap, _Complex int);
+  *p += __imag__ va_arg (ap, _Complex double);
+  *p += __imag__ va_arg (ap, _Complex long double);
+}
+
+template <typename T>
+void
+f3 (T *p, va_list ap)
+{
+  *p = va_arg (ap, T);
+}
+
+void
+foo (int x, va_list ap)
+{
+  if (x == 0)
+    {
+      long double ld;
+      f1 (&ld, ap);
+    }
+  else if (x == 1)
+    {
+      int i;
+      f2 (&i, ap);
+    }
+  else if (x == 2)
+    {
+      long double ld;
+      f3 (&ld, ap);
+    }
+  else if (x == 3)
+    {
+      _Complex double cd;
+      f3 (&cd, ap);
+    }
+}