2020-08-28 01:07:47.150465+0800 WebRTC4iOS2[6565:308353] *** Assertion failure in UITraitCollection * _Nonnull _UIGetCurrentFallbackTraitCollection(void)(), /Library/Caches/com.apple.xbs/Sources/UIKitCore_Sim/UIKit-3920.31.102/_UIFallbackEnvironment.m:91
2020-08-28 01:07:47.158522+0800 WebRTC4iOS2[6565:308353] *** Terminating app due to uncaught exception ‘NSInternalInconsistencyException’, reason: ‘<CallViewController: 0x7fce6840c660> returned nil from -traitCollection, which is not allowed.’
*** First throw call stack:
(
0 CoreFoundation 0x00007fff23e3de6e __exceptionPreprocess + 350
1 libobjc.A.dylib 0x00007fff512539b2 objc_exception_throw + 48
2 CoreFoundation 0x00007fff23e3dbe8 +[NSException raise:format:arguments:] + 88
3 Foundation 0x00007fff258d6c9b -[NSAssertionHandler handleFailureInFunction:file:lineNumber:description:] + 166
4 UIKitCore 0x00007fff48f71c05 _UIGetCurrentFallbackTraitCollection + 955
5 UIKitCore 0x00007fff497f96a1 UIViewCommonInitWithFrame + 644
6 UIKitCore 0x00007fff497f93df -[UIView initWithFrame:] + 98
7 WebRTC 0x000000010c917495 RTCShutdownInternalTracer + 3977
8 WebRTC 0x000000010c91739e RTCShutdownInternalTracer + 3730
9 WebRTC4iOS2 0x000000010c4033eb -[CallViewController viewDidLoad] + 395
10 UIKitCore 0x00007fff48c7598e -[UIViewController _sendViewDidLoadWithAppearanceProxyObjectTaggingEnabled] + 83
11 UIKitCore 0x00007fff48c7a8ac -[UIViewController loadViewIfRequired] + 1084
12 UIKitCore 0x00007fff48c7acc9 -[UIViewController view] + 27
13 WebRTC4iOS2 0x000000010c400da6 -[ViewController btnClick:] + 374
14 UIKitCore 0x00007fff49326c1d -[UIApplication sendAction:to:from:forEvent:] + 83
15 UIKitCore 0x00007fff48cd5baa -[UIControl sendAction:to:forEvent:] + 223
16 UIKitCore 0x00007fff48cd5ef2 -[UIControl _sendActionsForEvents:withEvent:] + 396
17 UIKitCore 0x00007fff48cd4e63 -[UIControl touchesEnded:withEvent:] + 497
18 UIKitCore 0x00007fff49362508 -[UIWindow _sendTouchesForEvent:] + 1359
19 UIKitCore 0x00007fff4936428d -[UIWindow sendEvent:] + 4501
20 UIKitCore 0x00007fff4933e6d1 -[UIApplication sendEvent:] + 356
21 UIKitCore 0x00007fff493c94ce __dispatchPreprocessedEventFromEventQueue + 7628
22 UIKitCore 0x00007fff493cc692 __handleEventQueueInternal + 6584
23 UIKitCore 0x00007fff493c2f35 __handleHIDEventFetcherDrain + 88
24 CoreFoundation 0x00007fff23da1c91 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17
25 CoreFoundation 0x00007fff23da1bbc __CFRunLoopDoSource0 + 76
26 CoreFoundation 0x00007fff23da1394 __CFRunLoopDoSources0 + 180
27 CoreFoundation 0x00007fff23d9bf8e __CFRunLoopRun + 974
28 CoreFoundation 0x00007fff23d9b8a4 CFRunLoopRunSpecific + 404
29 GraphicsServices 0x00007fff38c39bbe GSEventRunModal + 139
30 UIKitCore 0x00007fff49325968 UIApplicationMain + 1605
31 WebRTC4iOS2 0x000000010c403150 main + 112
32 libdyld.dylib 0x00007fff520ce1fd start + 1
33 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException