--- old/src/os_cpu/linux_x86/vm/thread_linux_x86.cpp	2016-08-04 15:08:11.716715444 -0700
+++ new/src/os_cpu/linux_x86/vm/thread_linux_x86.cpp	2016-08-04 15:08:11.592708381 -0700
@@ -46,7 +46,7 @@
 
   // If we have a last_Java_frame, then we should use it even if
   // isInJava == true.  It should be more reliable than ucontext info.
-  if (jt->has_last_Java_frame()) {
+  if (jt->has_last_Java_frame() && jt->frame_anchor()->walkable()) {
     *fr_addr = jt->pd_last_frame();
     return true;
   }