re PR c++/33342 (ICE in dependent_type_p, at cp/pt.c:15081)

        PR c++/33342
        * pt.c (most_specialized_class): Set processing_template_decl
        while tsubsting partial spec args.

From-SVN: r128285

gcc/cp/ChangeLog

+2007-09-08  Jason Merrill  <jason@redhat.com>
+
+	PR c++/33342
+	* pt.c (most_specialized_class): Set processing_template_decl
+	while tsubsting partial spec args.
+
 2007-09-06  Jason Merrill  <jason@redhat.com>
 
 	* decl2.c (get_guard): Copy visibility from the guarded variable.

gcc/cp/pt.c

@@ -13646,6 +13646,8 @@ most_specialized_class (tree type, tree tmpl)
 	{
 	  int i;
 
+	  ++processing_template_decl;
+
 	  /* Discard the outer levels of args, and then substitute in the
 	     template args from the enclosing class.  */
 	  partial_spec_args = INNERMOST_TEMPLATE_ARGS (partial_spec_args);
@@ -13661,6 +13663,8 @@ most_specialized_class (tree type, tree tmpl)
 	  for (i = TREE_VEC_LENGTH (parms) - 1; i >= 0; --i)
 	    TREE_VEC_ELT (parms, i) =
 	      tsubst (TREE_VEC_ELT (parms, i), outer_args, tf_none, NULL_TREE);
+
+	  --processing_template_decl;
 	}
       spec_args = get_class_bindings (parms,
 				      partial_spec_args,