diff -r 63eb7e38ce84 -r 9d1a788dea3d src/hotspot/cpu/x86/frame_x86.inline.hpp
--- a/src/hotspot/cpu/x86/frame_x86.inline.hpp	Tue Jan 29 14:34:26 2019 +0100
+++ b/src/hotspot/cpu/x86/frame_x86.inline.hpp	Tue Jan 29 14:43:05 2019 +0100
@@ -133,11 +133,6 @@
 // frame.
 inline intptr_t* frame::id(void) const { return unextended_sp(); }
 
-// Relationals on frames based
-// Return true if the frame is younger (more recent activation) than the frame represented by id
-inline bool frame::is_younger(intptr_t* id) const { assert(this->id() != NULL && id != NULL, "NULL frame id");
-                                                    return this->id() < id ; }
-
 // Return true if the frame is older (less recent activation) than the frame represented by id
 inline bool frame::is_older(intptr_t* id) const   { assert(this->id() != NULL && id != NULL, "NULL frame id");
                                                     return this->id() > id ; }