* decl.c (decls_match): Assert that the arguments are decls.

From-SVN: r183100

gcc/cp/ChangeLog

 2012-01-11  Jason Merrill  <jason@redhat.com>
 
+	* decl.c (decls_match): Assert that the arguments are decls.
+
 	PR c++/51613
 	* pt.c (resolve_overloaded_unification): Compare types with
 	same_type_p, not decls_match.

gcc/cp/decl.c

@@ -952,6 +952,8 @@ decls_match (tree newdecl, tree olddecl)
        interested in their types.  */
     return 0;
 
+  gcc_assert (DECL_P (newdecl));
+
   if (TREE_CODE (newdecl) == FUNCTION_DECL)
     {
       tree f1 = TREE_TYPE (newdecl);