1 files changed, 13 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/onExceptionUnwind-06.js b/js/src/jit-test/tests/debug/onExceptionUnwind-06.js
new file mode 100644
index 000000000..bab342dd1
--- /dev/null
+++ b/js/src/jit-test/tests/debug/onExceptionUnwind-06.js
@@ -0,0 +1,13 @@
+// onExceptionUnwind assigning to argv[1] does not affect the thrown exception.
+
+var g = newGlobal();
+g.parent = this;
+g.eval("function f(frame, exc) { f2 = function () { return exc; }; exc = 123; }");
+g.eval("new Debugger(parent).onExceptionUnwind = f;");
+
+var obj = new Error("oops");
+try {
+    throw obj;
+} catch (exc) {
+    assertEq(exc, obj);
+}