Open Radar

 
Summary:
After sharing something using UIActivityViewController and extensions (we especially noticed this with Slack), the extension crashes our app in the following thred: com.apple.extension.global-state-queue.

2  Social                         0x194a04dbc __66-[SLComposeViewController initWithExtension:requestedServiceType:]_block_invoke + 84
3  Foundation                     0x184103b04 __85-[NSExtension _completeRequestReturningItems:forExtensionContextWithUUID:completion:]_block_invoke + 108


We don't even use Social.framework anywhere in the app, so we also don't cause a crash by trying to use SLComposeViewController in iOS 11. We attached a crash report from Crashlytics as well. We did some research and this crash seems to appear for other developers as well. Take a look at the following examples:
- https://github.com/EstebanFuentealba/react-native-share/issues/84
- https://stackoverflow.com/questions/47055503/crash-on-slcomposeviewcontroller-initwithextensionrequestedservicetype-block
- https://github.com/artsy/eigen/issues/1349

We tried to share to items using UIActivityViewController: an instance of NSURL and a simple string.


Steps to Reproduce:
1. Share something using an extension (try Slack)
2. Press "Post" in extension's view controller
3. Extension crashes our app

Version/Build:
11.1.1 (15B150), iPhone SE