re PR c++/45894 ([C++0x] ICE: segmentation fault with -Wall)

	PR c++/45894
	* tree.c (lvalue_kind): Don't crash if ref has NULL type.

	* g++.dg/warn/Wsequence-point-2.C: New test.

From-SVN: r166481

gcc/cp/ChangeLog

+2010-11-09  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/45894
+	* tree.c (lvalue_kind): Don't crash if ref has NULL type.
+
 2010-11-08  Jason Merrill  <jason@redhat.com>
 
 	PR c++/46382

gcc/cp/tree.c

@@ -67,7 +67,8 @@ lvalue_kind (const_tree ref)
 	  == REFERENCE_TYPE)
     return lvalue_kind (TREE_OPERAND (ref, 0));
 
-  if (TREE_CODE (TREE_TYPE (ref)) == REFERENCE_TYPE)
+  if (TREE_TYPE (ref)
+      && TREE_CODE (TREE_TYPE (ref)) == REFERENCE_TYPE)
     {
       /* unnamed rvalue references are rvalues */
       if (TYPE_REF_IS_RVALUE (TREE_TYPE (ref))

gcc/testsuite/ChangeLog

+2010-11-09  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/45894
+	* g++.dg/warn/Wsequence-point-2.C: New test.
+
 2010-11-09  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/46313

gcc/testsuite/g++.dg/warn/Wsequence-point-2.C

+// PR c++/45894
+// { dg-do compile }
+// { dg-options "-std=c++0x -Wsequence-point" }
+
+struct F
+{
+  template <typename = int>
+  void bar ();
+};
+template <typename = int>
+struct V
+{
+  V (const V &) { F::bar <>; }
+};
+struct C
+{
+  V <> v;
+};
+struct B
+{
+  C f ();
+};
+struct A
+{
+  C c;
+  B b;
+  A () : c (b.f ()) { }
+};