INT128 cast to unsigned int gives wrong value

[AEsir777]

RETURN TO_UINT8(TO_INT128(-1));
[2023-10-25 16:05:51.416] [error] PLAN0 NOT PASSED.
[2023-10-25 16:05:51.416] [info] PLAN:
PROJECTION[TO_UINT8(TO_INT128(NEGATE(1)))]
DUMMY_SCAN[]
[2023-10-25 16:05:51.416] [info] RESULT:

[2023-10-25 16:05:51.416] [info] 255

[AEsir777]

Follow up:
cast negative string to int128
-170141183460469231731687303715884105728 to int128 are both causing error

[Ashleyhx]

-170141183460469231731687303715884105728 is not within int128's range (-170141183460469231731687303715884105727 to 170141183460469231731687303715884105727). reference here

so this should be the correct return?

[info] QUERY: RETURN TO_INT128("-170141183460469231731687303715884105728");
[2023-10-31 13:14:49.053] [error] Conversion exception: Cast failed. -170141183460469231731687303715884105728 is not within INT128 range.