Summary:
It is possible that race conditions exist in access of scheduler and UIManager in Binding.cpp, such that deallocated or null schedulers/UIManagers could be passed as arguments into various functions, causing strange and exotic crashes down the line once garbage memory (or null pointers) are dereferenced.
I think it's possible that navigating away from a Fabric screen while there's high memory pressure could cause things to get deallocated more aggressively and cause scheduler and/or UIManager to disappear while mounting instructions are being created, for instance.
Reviewed By: mdvacca
Differential Revision: D15863193
fbshipit-source-id: a85cb71d88ea54826b40f44e788931dfc422f045
Joshua Gross
4a5060f4cb