[UIWebView] iPhone 6 Plus copy/cut/paste keys cause app to crash

Originator:radexpl
Number:rdar://27761987 Date Originated:09-Aug-2016 10:32 AM
Status:Open Resolved:
Product:iOS SDK Product Version:10.0 beta 4, 9.3
Classification:Crash/Hang/Data Loss Reproducible:Always
 
Summary:
Tapping on iPhone Plus keyboard’s copy/cut/paste keys causes the app to crash when invoked on a UIWebView input

Steps to Reproduce:
1. Add an <input> to a UIWebView
2. Tap on the input on a 6 Plus/6s Plus to open the keyboard
3. Switch to landscape to reveal cut/copy/paste keys
4. Tap on one of those keys

Expected Results:
- Text is cut, copied, or pasted

Actual Results:
- App crashes

Notes:
- Happens on 9.3 and still on 10.0 beta 4, on both Simulator and real devices. Does not crash on WKWebView.

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