--- a/src/hotspot/os_cpu/linux_x86/thread_linux_x86.hpp	Wed Mar 21 17:09:34 2018 -0400
+++ b/src/hotspot/os_cpu/linux_x86/thread_linux_x86.hpp	Wed Mar 21 19:45:24 2018 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -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....