Overflowed constant

The overflowed value due to arithmetic on constants is too small or unexpectedly negative, causing incorrect computations. Integer overflow occurs in arithmetic on constant operands
/src/mongo/db/storage/key_string.cpp:2333: INTEGER_OVERFLOW 175035 Expression "52UL - exponent", where "exponent" is known to be equal to 18446744073709551615, underflows the type of "52UL - exponent", which is type "unsigned long".