We're currently seeing this, which I've tracked down as being caused by bug 882339: https://tbpl.mozilla.org/php/getParsedLog.php?id=24827942&tree=Thunderbird-Trunk TEST-START | /home/cltbld/talos-slave/test/build/mozmill/content-tabs/test-plugin-blocked.js | test_blocklisted_plugin_notification Timeout: bridge.execFunction("3069ba0e-e30d-11e2-895f-34159e18d332", bridge.registry["{1d806bea-7ea6-404a-8993-8a6ae4abcb3d}"]["runTestDirectory"], ["/home/cltbld/talos-slave/test/build/mozmill/content-tabs"]) TEST-UNEXPECTED-FAIL | Disconnect Error: Application unexpectedly closed

This is a test-only fix, that ports the relevant change from https://hg.mozilla.org/mozilla-central/rev/4fb8fa8668c5 It has cleared the failures on try server: https://tbpl.mozilla.org/?tree=Thunderbird-Try&rev=da4f0924a59b Note, tryserver has a failure about "test-plugin-outdated.js" on Mac 10.6, but I think that's unrelated possible random orange. I've triggered a couple more builds for that, but I suspect that's a different bug as this bug covers all platforms.

Comment on attachment 770301 [details] [diff] [review] The fix Review of attachment 770301 [details] [diff] [review]: ----------------------------------------------------------------- Yes, this does solve the problem for me locally on linux.

Comment on attachment 770301 [details] [diff] [review] The fix [Triage Comment] Ok, taking this onto Aurora. Although there's potentially bug 889745, I don't think that was directly caused by this bug (I suspect it may have been hidden due to this issue), and it is Mac only. It also gives a much more readable failure on tbpl, so its an improvement.