Overflowed return value

The return value will be too small or even negative, likely resulting in unexpected behavior in a caller that uses the return value. An integer overflow occurs, with the overflowed value used as the return value of the function
/src/mongo/bson/bsonelement.cpp:462: INTEGER_OVERFLOW 142653 Called function "this->canonicalType()", and a possible return value may be less than zero.
/src/mongo/bson/bsonelement.cpp:462: INTEGER_OVERFLOW 142653 An assign that casts to a different type, which might trigger an overflow.
/src/mongo/bson/bsonelement.cpp:464: INTEGER_OVERFLOW 142653 The expression "lt - rt" is considered to have possibly overflowed.
/src/mongo/bson/bsonelement.cpp:464: INTEGER_OVERFLOW 142653 Assigning: "diff" = "lt - rt".
/src/mongo/bson/bsonelement.cpp:465: INTEGER_OVERFLOW 142653 "diff", which might have overflowed, is returned from the function.