Unknown crash in Swift 4.0 in iOS 9.3

Question

I am facing very strange crash in my application. Application is working fine in > iOS 10 all version but it is crashing in iOS 9.x versions. I am not able to figure out why this is happening. It is not showing any kind of error in log console or in Zimbie or with evern try catch block.

I am dead lock over here. Any help would be highly appreciated. Here is the image with code with crash. I return multiple types like Int, Int32, Int64 and String but in all cases it is getting crash.

@VishalVaghasiya I added debug point and it stops here only. — Ajay Gabani, Jun 02 '18 at 06:37
Edit your question and add debug log. It seems the problem is in your database file. — Hassan Shahbazi, Jun 02 '18 at 06:42
@HassanShahbazi App is completely working in > iOS 10.0 versions. I think if the problem is with DB than it should not work at all. what you say? — Ajay Gabani, Jun 02 '18 at 06:47
I'm not sure what is the problem before you share some parts of the code and the debug log. But with a quick look at your screenshot, I can clearly see `CoreData: Failed to call designed initializer on ....`. Maybe you have changed your core data design and yet didn't remove the latest version from iOS 9.3 device? — Hassan Shahbazi, Jun 02 '18 at 06:50
Line 366, remove `= CDGroups()`. See [this answer](https://stackoverflow.com/a/33307824/3985749). — pbasdf, Jun 02 '18 at 07:36

score 1 · Answer 1 · answered Jun 03 '18 at 07:15

One way to think about core data objects is that they are not 'real' objects with 'real' properties in them. They are a just an objectId and a pointer to context. Whenever you access a property of it, it queries it's context with its objectID to get it.

When you have this view of a managedObject some of core-data weirdness makes a lot more sense. You can't have a managedObject without a context so

... = CDGroups()

is wrong.

Unknown crash in Swift 4.0 in iOS 9.3

1 Answers1