Crash when attempting to init subclassed BaseMessageCollectionViewCell - Release only

[TimMumsnet]

I'm finding that initializing the TextMessageCollectionViewCell in the release build configuration causes a crash, for example:
TextMessageCollectionViewCell.sizingCell()

will call

private func commonInit() {

        // nil is returned here, and crashes    
        self.bubbleView = self.createBubbleView()
        ...
}

For some reason in release, self is type BaseMessageCollectionViewCell NOT TextMessageCollectionViewCell. But in the debug configuration, self is of type TextMessageCollectionViewCell (as expected).

Any ideas what could be triggering this?

Using Swift 2.2, Xcode 7.3

[diegosanchezr]

Are you seeing this in ChattoApp? I can't reproduce it either on master or dev branches.

[TimMumsnet]

You're right, I can't reproduce in the ChattoApp - I'm not sure if there's an extension or something that I'm missing, but simply calling
let cell = TextMessageCollectionViewCell.sizingCell()
in the AppDelegate will trigger the crash.

[diegosanchezr]

Can you provide an example project where it reproduces?

[TimMumsnet]

I've put together a project that quickly shows the problem I'm referencing, it should build if you download the zipped project, I'm not using Carthage or Pods, it's already setup to run in release.

https://github.com/TimMumsnet/TestChatApp.git

[diegosanchezr]

Thanks @TimMumsnet

Looks like a compiler bug. I will try to isolate and reproduce it in a smaller project when I have some spare time. In the meanwhile disable whole-module-optimization for ChattoAdditions. Also, feel free to fill a bug report in https://bugs.swift.org, we might get some earlier feedback from Apple ( and post it here if you do so please )

[TimMumsnet]

Great, thanks @diegosanchezr - that works for now and I'll let you know.

[diegosanchezr]

https://bugs.swift.org/browse/SR-1182

[diegosanchezr]

Fixed with Xcode 7.3.1

[TimMumsnet]

Great, thanks!

Tim Windsor Brown
iOS Developer | mumsnet.com http://mumsnet.com/

On 4 May 2016, at 11:20, Diego Sánchez notifications@github.com wrote:

Fixed with Xcode 7.3.1

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