192876 2018-12-19 14:04:39 -0800 Application Cache does not check for update properly on browser launch 2018-12-20 16:22:53 -0800 1 1 1 Unclassified WebKit WebCore Misc. Safari 12 Mac macOS 10.14 NEW P2 Normal --- 1 jjulik webkit-unassigned achristensen beidson oldest_to_newest 1489465 0 357722 jjulik 2018-12-19 14:04:39 -0800 Created attachment 357722 Compressed site for testing bug When visiting a page that has a cache manifest specified, Safari will fire a checking event. Afterwards, no further events are fired. You would expect a noupdate event to fire afterwards normally. It looks like Safari never actually makes a request to get the cache manifest when this occurs. I checked my server logs and didn't see any requests for the cache manifest file. The easiest way to reproduce the issue is as follows: 1. Setup a server to host the attached html and cache manifest 2. In preferences, set "Safari opens with" to "All windows from last session" 3. Visit the page 4. Close safari 5. Restart your mac 6. Open safari. It should open up your page, but will only fire a checking event. Note that if you then reload the page it will fire a checking event, followed by a noupdate. I have reproduced this on an iPad Air 2 running iOS 12.1.1 and a Macbook Pro running running macOS 10.14 w/ Safari version 12.0 (14606.136.1.9). I can also intermittently reproduce the issue if I just normally visit a page that has a cache manifest specified, but the most consistent way is by restarting the mac. It happens every time if I restart. 357722 2018-12-19 14:04:39 -0800 2018-12-19 14:04:39 -0800 Compressed site for testing bug AppCacheTest.zip application/x-zip-compressed 772 jjulik UEsDBBQAAAAIAGyAk00JEx/IygEAAJsEAAARAAAAQXBwQ2FjaGVUZXN0Lmh0bWyFVNtu2zAMfW6B /QPhFzvo4GB7TJwAxdAvaH6AkZhYmywJkpw0GPrvo3xJvLSo9WDD5OEhDym6qmOjoUGjDhTiJnt2 7heKmnb8VY7mbPvtsaoJJb8fqqiipi0DoUNCglbL3pr8QXjlIsSLo00W6S0uf+MJe2tiguEUh9aI qKyBYgF/b/Z08jYQhOiViPn6f9cJPeBQJWzgrIy055ItWglMdJ3nLuiail3iz2vE2IaCPqQd+UMH YHYqk4z15yjS1JCJtyKkFW2ylMITRnrp/UXu8gVTPPAZQkplDPkd94aDc65ddGrolOgOypNcQQ5P Qx1D7H2SvZWXpJuMLAbeMY2wJlhNpbbHYpZ+CHrvnmNnS2taJ1kEK5EXrnLSuPU9sqOXc6DkU+Y4 A2OJRluU80jy3voZjLG9ihmY3ad2zcKct0dPIXwGm7Y8bRFMeh4gUITWZYsvsf04VpDxaK5ZbzMa r957sRg/q2W/VpP9rNK16Paw/vFhSdmUPG67q1UAh0dOWttWS5AqOI0XwAiaMET4CQ0rZUSAPWl7 XgHCdYSdqu+ARrL12uP+fvFMEKZTHK6d1czCt2TPSeBAZ2isH/tTLd2kdK6Tf0rbf1BLAwQUAAAA CAAvXI1NTehkn0AAAABOAAAAFQAAAEFwcENhY2hlVGVzdC5tYW5pZmVzdHN2dPZwVfB19PN0cw0O 4eVyBvGteLmUHQsKnBOTM1JDUotL9HIT8zLTgAygeFlqUXFmfp6VgiEvF4qajJLcHABQSwECFAAU AAAACABsgJNNCRMfyMoBAACbBAAAEQAAAAAAAAABACAAAAAAAAAAQXBwQ2FjaGVUZXN0Lmh0bWxQ SwECFAAUAAAACAAvXI1NTehkn0AAAABOAAAAFQAAAAAAAAABACAAAAD5AQAAQXBwQ2FjaGVUZXN0 Lm1hbmlmZXN0UEsFBgAAAAACAAIAggAAAGwCAAAAAA==