1 files changed, 15 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/gc-09.js b/js/src/jit-test/tests/debug/gc-09.js
new file mode 100644
index 000000000..742d2d95a
--- /dev/null
+++ b/js/src/jit-test/tests/debug/gc-09.js
@@ -0,0 +1,15 @@
+// Bug 717104 - Unreachable debuggee globals should not keep their debuggers
+// alive. The loop is to defeat conservative stack scanning; if the same stack
+// locations are used each time through the loop, at least three of the
+// debuggers should be collected.
+
+for (var i = 0; i < 4; i++) {
+    var g = newGlobal();
+    var dbg = new Debugger(g);
+    dbg.onDebuggerStatement = function () { throw "FAIL"; };
+    dbg.o = makeFinalizeObserver();
+    dbg.loop = g; // make a cycle of strong references with dbg and g
+}
+
+gc();
+assertEq(finalizeCount() > 0, true);