diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/onExceptionUnwind-08.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/onExceptionUnwind-08.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+// Ensure that ScriptDebugEpilogue gets called when onExceptionUnwind
+// throws an uncaught exception.
+var g = newGlobal();
+var dbg = Debugger(g);
+var frame;
+dbg.onExceptionUnwind = function (f, x) {
+    frame = f;
+    assertEq(frame.live, true);
+    throw 'unhandled';
+};
+dbg.onDebuggerStatement = function(f) {
+    assertEq(f.eval('throw 42'), null);
+    assertEq(frame.live, false);
+};
+g.eval('debugger');
+
+// Don't fail just because we reported an uncaught exception.
+quit(0);