rotate device cause crash on iOS

[alexzheng]

Operating system or device, Godot version, GPU Model and driver (if graphics related):
godot 2.1
iOS 10

Issue description:

2017-09-27 18:47:06.125802+0800 godot_opt.iphone[929:199778] [App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction
2017-09-27 18:47:06.125918+0800 godot_opt.iphone[929:199778] [App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction
******** screen size 640, 1136
******** screen size 640, 1136
(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x10)
    frame #0: 0x0000000183a6c150 libobjc.A.dylib`objc_msgSend + 16
    frame #1: 0x000000018b378bf0 UIKit`-[UIClientRotationContext rotateSnapshots] + 476
    frame #2: 0x000000018b1a853c UIKit`-[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:isRotating:] + 4900
    frame #3: 0x000000018b1a70bc UIKit`-[UIWindow _setRotatableViewOrientation:updateStatusBar:duration:force:] + 148
    frame #4: 0x000000018b19dc54 UIKit`__57-[UIWindow _updateToInterfaceOrientation:duration:force:]_block_invoke + 124
    frame #5: 0x000000018b129ca8 UIKit`-[UIWindow _updateToInterfaceOrientation:duration:force:] + 472
    frame #6: 0x0000000184f915f4 CoreFoundation`__CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 20
    frame #7: 0x0000000184f90d08 CoreFoundation`_CFXRegistrationPost + 400
    frame #8: 0x0000000184f90a84 CoreFoundation`___CFXNotificationPost_block_invoke + 60
    frame #9: 0x0000000184fff7a8 CoreFoundation`-[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1412
    frame #10: 0x0000000184ed495c CoreFoundation`_CFXNotificationPost + 376
    frame #11: 0x00000001859e7930 Foundation`-[NSNotificationCenter postNotificationName:object:userInfo:] + 68
    frame #12: 0x000000018b1297f4 UIKit`-[UIDevice setOrientation:animated:] + 324
    frame #13: 0x000000018b3c0e20 UIKit`__54-[UIApplication _handleDeviceOrientationChangedEvent:]_block_invoke + 88
    frame #14: 0x000000018b3c0d90 UIKit`-[UIApplication _handleDeviceOrientationChangedEvent:] + 140
    frame #15: 0x000000018b129598 UIKit`-[UIApplication handleEvent:withNewEvent:] + 1440
    frame #16: 0x000000018b128e90 UIKit`-[UIApplication sendEvent:] + 100
    frame #17: 0x000000018b193c14 UIKit`_UIApplicationHandleEvent + 404
    frame #18: 0x000000018693e8a0 GraphicsServices`_PurpleEventCallback + 744
    frame #19: 0x000000018693e390 GraphicsServices`PurpleEventCallback + 32
    frame #20: 0x0000000184fa5ae4 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 56
    frame #21: 0x0000000184fa5284 CoreFoundation`__CFRunLoopDoSource1 + 436
    frame #22: 0x0000000184fa2d98 CoreFoundation`__CFRunLoopRun + 1752
    frame #23: 0x0000000184ed2da4 CoreFoundation`CFRunLoopRunSpecific + 424
    frame #24: 0x000000018693d074 GraphicsServices`GSEventRunModal + 100
    frame #25: 0x000000018b18dc9c UIKit`UIApplicationMain + 208
  * frame #26: 0x0000000100177650 godot_opt.iphone`main(argc=1, argv=0x000000016fdcb948) at main.m:45
    frame #27: 0x0000000183ee159c libdyld.dylib`start + 4
(lldb) 

Steps to reproduce:
set the supported orientations all on in the project and run on the device and rotate it several times, it crash.

Link to minimal example project:

[mhilbrunner]

Can you try if this happens with 3.0 too?

[Calinou]

Closing due to lack of response (see @mhilbrunner's comment above). Please comment if you can still reproduce this bug with Godot 3.2.1 or 3.2.2beta4.