1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Frame-onPop-multiple-02.js b/js/src/jit-test/tests/debug/Frame-onPop-multiple-02.js
new file mode 100644
index 000000000..791b27752
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Frame-onPop-multiple-02.js
@@ -0,0 +1,36 @@
+// One Debugger's onPop handler can remove another Debugger's onPop handler.
+var g = newGlobal();
+var dbg1 = new Debugger(g);
+var dbg2 = new Debugger(g);
+
+var log;
+var frames = [];
+var firstPop = true;
+
+function handleEnter(frame) {
+    log += '(';
+    frames.push(frame);
+    frame.onPop = function handlePop(completion) {
+        log += ')';
+        assertEq(completion.return, 42);
+        if (firstPop) {
+            // We can't say which frame's onPop handler will get called first.
+            if (this == frames[0])
+                frames[1].onPop = undefined;
+            else
+                frames[0].onPop = undefined;
+            gc();
+        } else {
+            assertEq("second pop handler was called",
+                     "second pop handler should not be called");
+        }
+        firstPop = false;
+    };
+};
+
+dbg1.onEnterFrame = handleEnter;
+dbg2.onEnterFrame = handleEnter;
+
+log = '';
+assertEq(g.eval('40 + 2'), 42);
+assertEq(log, '(()');