--- old/src/hotspot/os_cpu/linux_x86/thread_linux_x86.hpp	2018-03-20 18:39:51.923534401 -0400
+++ new/src/hotspot/os_cpu/linux_x86/thread_linux_x86.hpp	2018-03-20 18:39:51.279474631 -0400
@@ -30,11 +30,7 @@
     _anchor.clear();
   }
 
-  frame pd_last_frame() {
-    assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
-    vmassert(_anchor.last_Java_pc() != NULL, "not walkable");
-    return frame(_anchor.last_Java_sp(), _anchor.last_Java_fp(), _anchor.last_Java_pc());
-  }
+  frame pd_last_frame();
 
  public:
   // Mutators are highly dangerous....