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
/data/mci/3b34054db808e84e865ea3adc167bb30/bazel_cache/8efb34a963653a257fe76e59a8ff65e9/execroot/_main/src/mongo/db/modules/enterprise/src/fcbis/backup_file_cloner.h:24: MISSING_LOCK 155318 Accessing "<anonymous>.start" without holding lock "mongo::repl::BaseCloner._mutex". Elsewhere, "mongo::repl::BackupFileCloner::Stats.start" is written to with "BaseCloner._mutex" held 1 out of 1 times (1 of these accesses strongly imply that it is necessary).