Self-sizing cells in demo project crashes the app in iOS 9.3

[Ricardo1980]

New issue checklist

• I have reviewed the README and documentation
• I have searched existing issues and this is not a duplicate

General information

• IGListKit version: Last one
• iOS version(s): iOS 9.3 (It works fine under iOS 10)
• CocoaPods/Carthage version: Last one.
• Xcode version: 8.2.1
• Devices/Simulators affected: iPhone 6s iOS 93.
• Reproducible in the demo project? (Yes/No): Yes
• Related issues:

Hello,

My app works perfectly under iOS 10, but crashes in iOS 9.3.

I realised we have the same problem in the demo project.

Just open IGListKitExamples and select "Self-sizing cells" under any iOS 9.3 simulator.
The app will crash (the other demos work perfectly).

So, it seems we cannot have variable height cells in iOS 9.3.

[Nonepse]

Also tested with:

pod 'IGListKit', :git => 'https://github.com/Instagram/IGListKit', :commit => '5eca718ea7df02bc091dc65bfe1d452c486b3ba9'

[jessesquires]

Thanks @Ricardo1980 !

We're tracking this at #516 😄