UM* mismatch

[drom]

Error: in line: 337 T{ MID-UINT+1 2 UM* -> 0 1 }T  expected [ 0, -1 ] to deeply equal [ 0, 1 ].
Error: in line: 338 T{ MID-UINT+1 4 UM* -> 0 2 }T  expected [ 0, -2 ] to deeply equal [ 0, 2 ].
Error: in line: 339 T{ 1S 2 UM* -> 1S 1 LSHIFT 1 }T  expected [ -2, -1 ] to deeply equal [ -2, 1 ].
Error: in line: 340 T{ MAX-UINT MAX-UINT UM* -> 1 1 INVERT }T  expected [ 1, 0 ] to deeply equal [ 1, -2 ].