Data race condition

The value of the shared data will be determined by the interleaving of thread execution. Thread shared data is accessed without holding an appropriate lock, possibly causing a race condition
/src/mongo/db/modules/enterprise/src/fcbis/file_copy_based_initial_syncer.cpp:914: MISSING_LOCK 154898 Accessing "this->this" without holding lock "mongo::repl::FileCopyBasedInitialSyncer._mutex". Elsewhere, "mongo::repl::FileCopyBasedInitialSyncer::_extendBackupCursorWithRetry(std::shared_ptr<std::vector<mongo::BSONObj, std::allocator<mongo::BSONObj> > >)::[lambda(mongo::Status) (instance 1)].this" is written to with "FileCopyBasedInitialSyncer._mutex" held 1 out of 1 times.