STR: * push an older gecko so that the system update is triggered (it does that for me as soon as I flash with a self-built build with VARIANT=user) * fill in your /data partition (pushing a 2395140 kbytes file works fine) * accept the system update Expected: * There should be an error saying that we don't have enough space left on the device, as we do for app installs Actual: * the system update downloads until it stops with no log. We only see the normal update logs. * the phone is stuck; the update throbber still spins, but the animated gif are not animated anymore, and all interactions stopped working * a prolonged press on the power button seemed to do something (maybe rebooting the phone as I saw the "Turkcell" splash screen) * then I got a useful log [1] but the phone is non working, the screen stays black, maybe because of log [2]. * rebooting the phone with |adb reboot| doesn't help more, it stays the same * removing the big file in /sdata and rebooting makes the phone working again and the system update was downloading/installing automatically (this is Bug 821523). Nominating because this is a case where the phone is left in a unfixable state, but I don't know in which component this should go, because the system update uses the standard Firefox update. [1] E/GeckoConsole( 109): [JavaScript Error: "NS_ERROR_FILE_NO_DEVICE_SPACE: Component returned failure code: 0x80520010 (NS_ERROR_FILE_NO_DEVICE_SPACE) [nsIFileOutputStream.write]" {file: "jar:file:///system/b2g/omni.ja!/components/nsUpdateService.js" line: 679}] [2] E/GeckoConsole( 109): [JavaScript Error: "UnknownError" {file: "app://system.gaiamobile.org/js/window_manager.js" line: 546}]