re PR c++/43024 (ICE on template code with -O2 or -O3, regression from 4.4.2)

	PR c++/43024
	* name-lookup.h (current_binding_level): Check for null
	cp_function_chain.

From-SVN: r156741

gcc/cp/ChangeLog

 2010-02-12  Jason Merrill  <jason@redhat.com>
 
+	PR c++/43024
+	* name-lookup.h (current_binding_level): Check for null
+	cp_function_chain.
+
+2010-02-12  Jason Merrill  <jason@redhat.com>
+
 	PR c++/43054
 	* tree.c (cp_tree_equal): Correct CALL_EXPR logic.
 

gcc/cp/name-lookup.h

@@ -259,7 +259,7 @@ struct GTY(()) cp_binding_level {
 /* The binding level currently in effect.  */
 
 #define current_binding_level			\
-  (*(cfun && cp_function_chain->bindings	\
+  (*(cfun && cp_function_chain && cp_function_chain->bindings \
    ? &cp_function_chain->bindings		\
    : &scope_chain->bindings))