As soon as the Play() function is called on the WebCamTexture, the app crashes.

Steps:
1. Build and Run attached project (CameraTestProject-edited.zip) for iOS device
2. In Player: press button "cam.Play()"

Expected behavior: a camera is used and it shows a view in a player.
Actual behavior: build crashes.

Reproduced with: 5.6.4p2, 2017.1.2p3, 2018.1.0a3.

Tested with:
iPad mini 3 - iOS10.3.2 - reproduced
iPad Pro 10.5 2017 - iOS10.3.3 - reproduced
iPad Pro 10.5 2017 - iOS11.0 - reproduced
LG Nexus 5 - Android 7.1.1 - not reproduced

Note: on Android, everything works as expected.

WON'T FIX:
"WebCamTexture class is used but Camera Usage Description is empty. App will not work on iOS 10+."

WORKAROUND: fill out Camera Usage Description in player settings (or set NSCameraUsageDescription in Info.plist)
https://developer.apple.com/library/content/documentation/General/Reference/InfoPlistKeyReference/Articles/CocoaKeys.html#//apple_ref/doc/uid/TP40009251-SW24