Unchecked return value from library

The function returns a value that indicates an error condition. If this is not checked, the error condition may not be handled correctly. Value returned from a library function is not checked for errors before being used. This value may indicate an error condition.
/data/mci/ca51a75ec01e2db4c86c36e81ffcbc1a/bazel_cache/9609e6a8b9a79735a5ea9f2aad32fa3a/execroot/_main/src/mongo/unittest/inline_auto_update.cpp:381: CHECKED_RETURN 162644 Calling "rename(tempFileName.c_str(), fileName->c_str())" without checking return value. This library function may fail and return an error code.