diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/onExceptionUnwind-04.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/onExceptionUnwind-04.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+// onExceptionUnwind is not called for exceptions thrown and handled in the debugger.
+var g = newGlobal();
+var dbg = Debugger(g);
+g.log = '';
+dbg.onDebuggerStatement = function (frame) {
+    try {
+        throw new Error("oops");
+    } catch (exc) {
+        g.log += exc.message;
+    }
+};
+dbg.onExceptionUnwind = function (frame) {
+    g.log += 'BAD';
+};
+
+g.eval("debugger; log += ' ok';");
+assertEq(g.log, 'oops ok');