1 files changed, 21 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Frame-onPop-12.js b/js/src/jit-test/tests/debug/Frame-onPop-12.js
new file mode 100644
index 000000000..044c23b6d
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Frame-onPop-12.js
@@ -0,0 +1,21 @@
+// Setting an onPop handler from an onPop handler doesn't throw, but the
+// new handler doesn't fire.
+var g = newGlobal();
+var dbg = new Debugger(g);
+var log;
+
+dbg.onDebuggerStatement = function handleDebugger(frame) {
+    log += 'd';
+    assertEq(frame.type, "eval");
+    frame.onPop = function firstHandlePop(c) {
+        log +=')';
+        assertEq(c.return, 'on investment');
+        this.onPop = function secondHandlePop(c) {
+            assertEq("secondHandlePop was called", "secondHandlePop should never be called");
+        };
+    };
+};
+
+log = "";
+g.eval("debugger; 'on investment';");
+assertEq(log, 'd)');