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Fabric: Fixing crash in RCTScrollViewComponentView (2nd attempt)
Summary: Seems a ScrollView sometimes calls the delegate in own destructor; and seems that in some configurations the delegate is also already destroyed at this point. I am not sure if this a bug in UIKit or not, but seems the fix is easy, we just have to clear the ScrollView's delegate on the delegate's deallocation. This issue is also looks similar: https://stackoverflow.com/questions/18778691/crash-on-exc-breakpoint-scroll-view/19011871 Changelog: [iOS] [Fixed] - Fixed crash in RCTScrollViewComponentView Reviewed By: sammy-SC Differential Revision: D17924429 fbshipit-source-id: 5727bca9f028e28f76f60304c187ee39eb6e1856
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