diff -r 000000000000 -r 6474c204b198 browser/devtools/webconsole/test/browser_console_dead_objects.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/webconsole/test/browser_console_dead_objects.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,91 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// Check that Dead Objects do not break the Web/Browser Consoles. See bug 883649.
+// This test does:
+// - opens a new tab,
+// - opens the Browser Console,
+// - stores a reference to the content document of the tab on the chrome window object,
+// - closes the tab,
+// - tries to use the object that was pointing to the now-defunct content
+// document. This is the dead object.
+
+const TEST_URI = "data:text/html;charset=utf8,<p>dead objects!";
+
+function test()
+{
+  let hud = null;
+
+  registerCleanupFunction(() => {
+    Services.prefs.clearUserPref("devtools.chrome.enabled");
+  });
+
+  Task.spawn(runner).then(finishTest);
+
+  function* runner() {
+    Services.prefs.setBoolPref("devtools.chrome.enabled", true);
+    let {tab} = yield loadTab(TEST_URI);
+
+    info("open the browser console");
+
+    hud = yield HUDService.toggleBrowserConsole();
+    ok(hud, "browser console opened");
+
+    hud.jsterm.clearOutput();
+
+    // Add the reference to the content document.
+
+    yield execute("Cu = Components.utils;" +
+                  "Cu.import('resource://gre/modules/Services.jsm');" +
+                  "chromeWindow = Services.wm.getMostRecentWindow('navigator:browser');" +
+                  "foobarzTezt = chromeWindow.content.document;" +
+                  "delete chromeWindow");
+
+    gBrowser.removeCurrentTab();
+
+    let msg = yield execute("foobarzTezt");
+
+    isnot(hud.outputNode.textContent.indexOf("[object DeadObject]"), -1,
+          "dead object found");
+
+    hud.jsterm.setInputValue("foobarzTezt");
+
+    for (let c of ".hello") {
+      EventUtils.synthesizeKey(c, {}, hud.iframeWindow);
+    }
+
+    yield execute();
+
+    isnot(hud.outputNode.textContent.indexOf("can't access dead object"), -1,
+          "'cannot access dead object' message found");
+
+    // Click the second execute output.
+    let clickable = msg.querySelector("a");
+    ok(clickable, "clickable object found");
+    isnot(clickable.textContent.indexOf("[object DeadObject]"), -1,
+          "message text check");
+
+    msg.scrollIntoView();
+
+    executeSoon(() => {
+      EventUtils.synthesizeMouseAtCenter(clickable, {}, hud.iframeWindow);
+    });
+
+    yield hud.jsterm.once("variablesview-fetched");
+    ok(true, "variables view fetched");
+
+    msg = yield execute("delete window.foobarzTezt; 2013-26");
+
+    isnot(msg.textContent.indexOf("1987"), -1, "result message found");
+  }
+
+  function execute(str) {
+    let deferred = promise.defer();
+    hud.jsterm.execute(str, (msg) => {
+      deferred.resolve(msg);
+    });
+    return deferred.promise;
+  }
+}