Created attachment 255889 [details] crash stack uiwebview load a page contains some input、textarea, and click or switch they quickly,some times it crashed. The debug console outputs [UITextSelection setRangedSelectionBaseToCurrentSelection] message sent to deallocated instance
<rdar://problem/21629073>
Which version of iOS does this reproduce on? Please attach a full crash log (generated by iOS) rather than an image of a stack trace from Xcode.
Based on crash data, this crash has stopped occurring in recent iOS 9 developer seed builds. Moving to RESOLVED/FIXED.