re PR c++/46058 (gcc crashes with lvalue error on the following Code)

	PR c++/46058
	* tree.c (lvalue_kind) [SCOPE_REF]: Handle non-dependent case.

From-SVN: r167435

gcc/cp/ChangeLog

+2010-12-03  Jason Merrill  <jason@redhat.com>
+
+	PR c++/46058
+	* tree.c (lvalue_kind) [SCOPE_REF]: Handle non-dependent case.
+
 2010-12-03  Richard Guenther  <rguenther@suse.de>
 
 	PR c/46745

gcc/cp/tree.c

@@ -146,9 +146,12 @@ lvalue_kind (const_tree ref)
 	return clk_ordinary;
       break;
 
-      /* A currently unresolved scope ref.  */
+      /* A scope ref in a template, left as SCOPE_REF to support later
+	 access checking.  */
     case SCOPE_REF:
-      gcc_unreachable ();
+      gcc_assert (!type_dependent_expression_p (CONST_CAST_TREE(ref)));
+      return lvalue_kind (TREE_OPERAND (ref, 1));
+
     case MAX_EXPR:
     case MIN_EXPR:
       /* Disallow <? and >? as lvalues if either argument side-effects.  */

gcc/testsuite/ChangeLog

+2010-12-03  Jason Merrill  <jason@redhat.com>
+
+	PR c++/46058
+	* g++.dg/template/scope4.C: New.
+
 2010-12-03  Nathan Froyd  <froydnj@codesourcery.com>
 
 	* gcc.target/arm/neon-offset-1.c: New test.

gcc/testsuite/g++.dg/template/scope4.C

+// PR c++/46058
+
+class StringLiterals {
+public:
+   static const char dec[];
+};
+
+template<class St, class Base, const char* name>
+class NoValueCommand : public Base {
+public:
+};
+
+template<class St, class Base>
+class DecBasic : public NoValueCommand<St,Base,StringLiterals::dec> {
+};