This happens when I start the application and taps rapidly on the screen while starting. I have no clues in the stacktrace since its all inside the framework. I'm fearing it might have something to do with ReactiveCocoa 2.0.
Error
Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<NSConcreteValue 0x40857fe0> valueForUndefinedKey:]: this class is not key value coding-compliant for the key x_60288.'
Stack trace
0 CoreFoundation 0x036c45e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x034478b6 objc_exception_throw + 44
2 CoreFoundation 0x037546a1 -[NSException raise] + 17
3 Foundation 0x015b98ca -[NSObject(NSKeyValueCoding) valueForUndefinedKey:] + 282
4 Foundation 0x01526921 _NSGetUsingKeyValueGetter + 81
5 Foundation 0x01525f5b -[NSObject(NSKeyValueCoding) valueForKey:] + 260
6 Foundation 0x01545a02 -[NSObject(NSKeyValueCoding) valueForKeyPath:] + 321
7 QuartzCore 0x02379bfb CAObject_valueForKeyPath_ + 2797
8 QuartzCore 0x02379ead CAObject_valueForKeyPath + 147
9 QuartzCore 0x0235ff4f -[CALayer valueForKeyPath:] + 24
10 UIKit 0x0262da96 _UIViewLayerAnimationCanBeConsideredFinished + 91
11 UIKit 0x026161c5 __22-[UIWindow sendEvent:]_block_invoke + 36
12 CoreFoundation 0x0374105d __53-[__NSArrayI enumerateObjectsWithOptions:usingBlock:]_block_invoke + 61
13 CoreFoundation 0x03740f92 -[__NSArrayI enumerateObjectsWithOptions:usingBlock:] + 258
14 CoreFoundation 0x036be0a5 -[NSArray enumerateObjectsUsingBlock:] + 53
15 UIKit 0x02615fa3 -[UIWindow sendEvent:] + 751
16 UIKit 0x025e9e86 -[UIApplication sendEvent:] + 242
17 UIKit 0x025d418f _UIApplicationHandleEventQueue + 11421
18 CoreFoundation 0x0364d83f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
19 CoreFoundation 0x0364d1cb __CFRunLoopDoSources0 + 235
20 CoreFoundation 0x0366a29e __CFRunLoopRun + 910
21 CoreFoundation 0x03669ac3 CFRunLoopRunSpecific + 467
22 CoreFoundation 0x036698db CFRunLoopRunInMode + 123
23 GraphicsServices 0x04c729e2 GSEventRunModal + 192
24 GraphicsServices 0x04c72809 GSEventRun + 104
25 UIKit 0x025d6d3b UIApplicationMain + 1225
26 IVYCore 0x00003242 main + 178
27 IVYCore 0x00003185 start + 53
This answer is not a duplicate because
- the source is unknown
- the key is unknown
- caused automatically by the frameworks
- no explicit clues
