Out-of-bounds read

Incorrect values read from a different memory region will cause incorrect computations. Out-of-bounds read from a buffer
/src/mongo/db/storage/key_string.cpp:1183: OVERRUN 114560 Function call "mongo::countLeadingZeros64(value)" may return 64.
/src/mongo/db/storage/key_string.cpp:1183: OVERRUN 114560 Assigning: "bytesNeeded" = "(64 - mongo::countLeadingZeros64(value) + 7) / 8". The value of "bytesNeeded" is now 0.
/src/mongo/db/storage/key_string.cpp:1187: OVERRUN 114560 Assigning: "firstUsedByte" = "reinterpret_cast<char const *>(&value + 1) - bytesNeeded". "firstUsedByte" now points to byte 8 of "value" (which consists of 8 bytes).