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Summary: Pull Request resolved: https://github.com/facebook/react-native/pull/36201 [Changelog][Internal] Guard call to the C++ ReadableNAtiveMap.importValues with a lock. Note that all the occurrences in this class (together with importTypes) already were protected by a lock, except of this one, which with the very high chance caused crashes in T145271136. My corresponding comment from the task, for justification: > If callstack to be trusted, the crash happens on the C++ side, in ReadableNativeMap::importValues(). It throws ArrayIndexOutOfBoundsException, which, looking at the code, seems to be only possible due to a corrupted data or race conditions. > Now, looking at the Java side of ReadableNativeMap, and the particular call site... it's very dodgy, since all other occurrences of calling to native importTypes/importValues are guarded by locks, but the one crashing isn't. NOTE: A couple of `importKeys()` instances appears to suffer from the same problem as well. Reviewed By: javache Differential Revision: D43398416 fbshipit-source-id: 0402de5dc723a2fba7d0247c8ad4aeff150d8340
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