This exception is happening during the end of api-utils tests: error: An exception occurred. Traceback (most recent call last): File "resource://0a7d8cb0-0a98-487b-8c23-7cb88be580f3-at-jetpack/api-utils/lib/timer.js", line 28, in notify callback.apply(null, args); File "resource://0a7d8cb0-0a98-487b-8c23-7cb88be580f3-at-jetpack/test-harness/lib/harness.js", line 185, in cleanup unload(loader); File "resource://0a7d8cb0-0a98-487b-8c23-7cb88be580f3-at-jetpack/api-utils/lib/cuddlefish.js", line 319, in unload observerService.notifyObservers(null, loader.unloadTopic, reason); File "resource://0a7d8cb0-0a98-487b-8c23-7cb88be580f3-at-jetpack/api-utils/lib/system/events.js", line 58, in data: data File "resource://0a7d8cb0-0a98-487b-8c23-7cb88be580f3-at-jetpack/api-utils/lib/unload.js", line 59, in unload observers.forEach(function(observer) { File "resource://0a7d8cb0-0a98-487b-8c23-7cb88be580f3-at-jetpack/api-utils/lib/unload.js", line 61, in observer(reason); File "resource://0a7d8cb0-0a98-487b-8c23-7cb88be580f3-at-jetpack/api-utils/lib/observer-service.js", line 125, in cache.slice().forEach(function(callback) { File "resource://0a7d8cb0-0a98-487b-8c23-7cb88be580f3-at-jetpack/api-utils/lib/observer-service.js", line 126, in Object.keys(subscribers(callback)).forEach(function(topic) { File "resource://0a7d8cb0-0a98-487b-8c23-7cb88be580f3-at-jetpack/api-utils/lib/namespace.js", line 35, in namespace let key = handle(target); File "resource://0a7d8cb0-0a98-487b-8c23-7cb88be580f3-at-jetpack/api-utils/lib/namespace.js", line 13, in handle return target[handle.key] || Object.defineProperty(target, handle.key, { TypeError: can't access dead object You can find an example here: https://tbpl.mozilla.org/php/getParsedLog.php?id=11397108&tree=Jetpack

Irakli, Would you have time to take a look at this one? That would be the last visible one in our tests. (after all others I've submitted patch for)

Pointer to Github pull-request

Comment on attachment 620966 [details] Pointer to Github pull request: https://github.com/mozilla/addon-sdk/pull/429 Can you ensure that landing a breaking change for FF12 is ok? The platform fix (bug 673468) landed only for FF13+. The dev branch of the SDK should currently be the one for 1.8, which is, I think, aiming to support FF13+. But install.rdf and SDK release schedule still says that current FF support is 12+: https://github.com/mozilla/addon-sdk/blob/master/python-lib/cuddlefish/app-extension/install.rdf https://wiki.mozilla.org/Jetpack/SDK_2012_Release_Schedule

(In reply to Alexandre Poirot (:ochameau) from comment #3) > Comment on attachment 620966 [details] > Pointer to Github pull request: https://github.com/mozilla/addon-sdk/pull/429 > > Can you ensure that landing a breaking change for FF12 is ok? Why is this breaking change ? With this change everything works for me on FF12. Are you sure that fix for bug 673468 was not shipped in FF12 ?

Commit pushed to master at https://github.com/mozilla/addon-sdk https://github.com/mozilla/addon-sdk/commit/8786e2f2891279b5c0e128159fa538dfb4a45d04 Merge pull request #429 from Gozala/bug/ns-workarounds@751584 fix Bug 751584 - Removing workarounds for bug 673468 r=@ochameau