It's already triggering the "failed" action. Tested on a device by starting the download of an application and after some seconds turning the wifi off, and it seems to work ok.
** Changed in: unity8 (Ubuntu) Status: Triaged => Fix Released -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity8 in Ubuntu. https://bugs.launchpad.net/bugs/1215562 Title: Progress preview does not fire action on Error Status in The Unity 8 shell: Triaged Status in “unity8” package in Ubuntu: Fix Released Bug description: The progress preview should fire an action when an error happens in the download. To manage notifications about this bug go to: https://bugs.launchpad.net/unity8/+bug/1215562/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp