diff -r 90c5e4348212 -r f815c3be1f2e hotspot/src/os_cpu/bsd_x86/vm/os_bsd_x86.cpp
--- a/hotspot/src/os_cpu/bsd_x86/vm/os_bsd_x86.cpp	Thu Sep 15 18:18:39 2016 +0300
+++ b/hotspot/src/os_cpu/bsd_x86/vm/os_bsd_x86.cpp	Mon Sep 26 15:56:39 2016 -0400
@@ -378,7 +378,9 @@
     // method returns the Java sender of the current frame.
     *fr = os::fetch_frame_from_ucontext(thread, uc);
     if (!fr->is_first_java_frame()) {
-      assert(fr->safe_for_sender(thread), "Safety check");
+      // get_frame_at_stack_banging_point() is only called when we
+      // have well defined stacks so java_sender() calls do not need
+      // to assert safe_for_sender() first.
       *fr = fr->java_sender();
     }
   } else {
@@ -395,7 +397,7 @@
       // has been pushed on the stack
       *fr = frame(fr->sp() + 1, fr->fp(), (address)*(fr->sp()));
       if (!fr->is_java_frame()) {
-        assert(fr->safe_for_sender(thread), "Safety check");
+        // See java_sender() comment above.
         *fr = fr->java_sender();
       }
     }