This question What do the nomodeset, quiet and splash kernel parameters mean? contains a link in a comment to https://www.kernel.org/doc/Documentation/kernel-parameters.txt
When viewing that question in the StackExchange iOS app on an iPad mini or an iPhone 4S, clicking on the link immediately crashes the App. For me this is 100% repeatable on both devices.
Both devices are running the latest iOS version (9.2) and the latest StackExchange app (1.4.2).
Curiously, viewing THIS post in the iOS app and tapping the link above DOES NOT crash the app. I added the link to this post as a comment to try to reproduce the issue here on Meta. The result is that it DOES NOT crash when tapping the link either in the body of this question or in the comment.
So, to summarize:
- The post in askubuntu contains the dodgy link in a comment
- Tapping the link from within the iOS app while viewing the post in AskUbuntu instantly crashes the app. The screen goes black and then displays the home screen
- The same dodgy link in THIS post does not crash the app when tapped, either in the post body or in a comment