--- old/src/hotspot/cpu/zero/frame_zero.inline.hpp	2018-03-20 18:39:35.730031611 -0400
+++ new/src/hotspot/cpu/zero/frame_zero.inline.hpp	2018-03-20 18:39:35.074970820 -0400
@@ -130,10 +130,6 @@
   return monitor_end - 1;
 }
 
-inline jint frame::interpreter_frame_expression_stack_direction() {
-  return -1;
-}
-
 // Return a unique id for this frame. The id must have a value where
 // we can distinguish identity and younger/older relationship. NULL
 // represents an invalid (incomparable) frame.