diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/onExceptionUnwind-resumption-03.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/onExceptionUnwind-resumption-03.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+// Check that an onExceptionUnwind hook can force a frame to throw a different exception.
+
+load(libdir + "asserts.js");
+
+var g = newGlobal();
+var dbg = Debugger(g);
+dbg.onExceptionUnwind = function (frame, exc) {
+    return { throw:"sproon" };
+};
+g.eval("function f() { throw 'ksnife'; }");
+assertThrowsValue(g.f, "sproon");