Open Radar

 
Summary:
When compiling an app for iOS 7 using XCode 7.0 Beta 2 I encountered two problems as soon as I extend the WKWebView: EXC_BAD_ACCESS on accessing static variables on an iOS 7.1.1 device and EXC_BAD_ACCESS on launch in debug mode on iOS 9 device.

Description:
When running on iOS 7.1.1 I get a crash in my sample program when I access a static variable.
Debugging revealed that this crash only happens when I write an extension for the WKWebView. It does not change a thing if there are methods in this extension or not. The declaration itself is enough.
As soon as I remove the protocol VCWebViewProvider from my WKWebView extension the program runs fine.

I guess there is a problem because I add an extension with a protocol to a class which is not available in iOS 7. I marked the extension as available in iOS 8 but this is not changing the behavior.

Additionally I get a crash in the AppDelegate when I want to run the app on iOS 9. The error does not happen when I change the deployment target to iOS 8 and does not produce a crash when I run the app without attaching the debugger but run the app directly from the springboard.

Steps to Reproduce:
1. Open XCode project
2. Run on iOS 7.1 device (not simulator)
3. App crashes in line 43 with EXC_BAD_ACCESS in ViewController.swift
4. Run on iOS 9 device
5. App crashes in AppDelegate.swift in line 13

Expected Results:
App does not crash at all.

Actual Results:
App crashes

Version:
Xcode 7.0 beta 2 (7A121l)

Notes:
Workaround: Deployment target 8.0. Remove protocol from WKWebView extension

Configuration:
iOS 7 device: iPad 3 (A1416) running iOS 7.1.1 (11D201)
iOS 9 device: iPad Air 2 (A1567) running iOS 9.0 Beta 2 (13A4280e)