(Maybe related to bug 918261 as they both seem to have popped up at the same time). TEST-UNEXPECTED-FAIL | /builds/slave/test/build/mozmill/session-store/test-session-store.js | test-session-store.js::teardownModule SUMMARY-UNEXPECTED-FAIL | test-session-store.js | test-session-store.js::test_clean_shutdown_session_persistence_simple EXCEPTION: loadedState is null at: test-session-store.js line 435 test_clean_shutdown_session_persistence_simple test-session-store.js 435 Runner.prototype.wrapper frame.js 585 Runner.prototype._runTestModule frame.js 655 Runner.prototype.runTestModule frame.js 701 Runner.prototype.runTestDirectory frame.js 525 runTestDirectory frame.js 707 Bridge.prototype._execFunction server.js 179 Bridge.prototype.execFunction server.js 183 SUMMARY-UNEXPECTED-FAIL | test-session-store.js | test-session-store.js::teardownModule EXCEPTION: mc.tabmail.tabInfo is undefined at: test-folder-display-helpers.js line 353 teardownModule test-folder-display-helpers.js 353 Runner.prototype.wrapper frame.js 580 Runner.prototype._runTestModule frame.js 677 Runner.prototype.runTestModule frame.js 701 Runner.prototype.runTestDirectory frame.js 525 runTestDirectory frame.js 707 Bridge.prototype._execFunction server.js 179 Bridge.prototype.execFunction server.js 183

I just did a bisect on this, bisect said: The first bad revision is: changeset: 155411:e1bed78a75d6 user: Bobby Holley <bobbyholley@gmail.com> date: Tue Sep 17 17:45:48 2013 -0400 summary: Bug 874502 - Part 6: Remove IsCallerChrome path for tearing down windows synchronously. r=bzbarsky, a=lsblakk My suspicion is that if window close are now async, that's probably broken the tests or the code.

Use close_window() instead of window.close() to wait for closing the window.

try server results: https://tbpl.mozilla.org/?tree=Thunderbird-Try&rev=6cc95bc70153 test-message-header.js failed, but I don't think it is related to the fix for this bug because test-message-header.js is in a different directory(message-header/).

Comment on attachment 808951 [details] [diff] [review] Fix Excellent, thanks.

Comment on attachment 808951 [details] [diff] [review] Fix [Triage Comment] Taking to aurora as we need this there.