iOS App Crashes when trying to open StackOverflow Page

Question

Using the iOS App (version 1.2.2) on iOS 8.2. I opened the app without an internet connection (worked fine), but then when I hit the menu button to go to the StackOverflow specific site the app crashed. Upon returning to a place with internet I noticed that all the sites usually listed in the menu were missing, so I logged out and logged back in. Now the app works, except that every time I go to the StackOverflow site from the menu (all other sites do work) the app crashes.

Answer 1

This will be fixed in the next build. The error I'm getting is EXC_BREAKPOINT UNKNOWN which as far as I can tell is Swift's way of saying it has no idea what went wrong. I suspect it's similar to this bug where casting an array failed.

The original code looks like this:

func transformItems(items:[AnyObject], type:StacManTagPreferenceType?) -> [StacManTagPreference] {

    let preferences = items as [StacManTagPreference]
    if type != nil {
        return preferences.filter({ $0.tagPreferenceType == type! })
    } else {
        return preferences
    }
}

I think this will fix it:

let preferences = items.map { $0 as StacManTagPreference }

But I really don't want to crash on what really is an optional behavior so I'm doing this:

let preferences = items.map { $0 as? StacManTagPreference } .filter { $0 != nil } .map { $0! }

Answer 2

Reinstalling the app appears to have resolved the issue. Perhaps this is an isolated incident, but just in case it's not hopefully there is a fix simpler than this and that the cause for this can be resolved.