The principle error stack hint is proven under：
Thread 1: EXC_BAD_ACCESS (code=1, handle=0x10000079c)
0
QuartzCore
CA::Layer::superlayer(CA::Transaction*) + 28
1
QuartzCore
-[CALayer(CALayerPrivate) ancestorSharedWithLayer:] + 112
2
QuartzCore
CA::Layer::map_geometry(CALayer*, CALayer*, void ()(void, CA::Mat4 const&), void ()(void, CA::Mat4 const&), void*) + 128
3
QuartzCore
-[CALayer convertPoint:toLayer:] + 80
4
UIKitCore
-[UIView(Geometry) convertPoint:toView:] + 108
5
UIAccessibility
-[NSObject(AXPrivCategory) _accessibilityBaseHitTest:withEvent:] + 3040
The above problem doesn’t happen when the voiceover accessibility characteristic is turned off. Though there’s a name to the convertPoint methodology within the code, the clicked voiceover component doesn’t name convertPoint. Is it attainable that the voiceover accessibility characteristic implicitly calls convertPoint? I’ve checked the accessibility settings associated to UIAccessibility parts，all seem like they’re appropriately arrange.， Has anybody encountered the same drawback, or can somebody give recommendation on methods to find the crash，thanks a lot。
