Logically dead code

The indicated dead code may have performed some action; that action will never occur. Code can never be reached because of a logical contradiction
/src/mongo/base/parse_number.cpp:202: DEADCODE 175141 Assigning: "maxMagnitude" = "18446744073709551615UL + (isNegative ? 1U : 0U)".
/src/mongo/base/parse_number.cpp:203: DEADCODE 175141 At condition "magnitude > maxMagnitude", the value of "maxMagnitude" must be equal to 18446744073709551615.
/src/mongo/base/parse_number.cpp:203: DEADCODE 175141 The condition "magnitude > maxMagnitude" cannot be true.
/src/mongo/base/parse_number.cpp:204: DEADCODE 175141 Execution cannot reach this statement: "<temporary>.Status(mongo::E...".