_: Bool = 0 # OK
_: Bool = 2 # ERR
_: {1, 2} = 2 # OK
_: {1, 3} = 4 # ERR
_: {4} = 3 - 2 # ERR
_: 1..10 = 1 # OK
_: 0..12 = 13 # ERR

_: {I: Int | I < 10 and I != 6} = 6 # ERR
_: {I: Int | I < 5} = 6 # ERR
_: {I: Int | I < 3 or I != 4} = 4 # ERR
_: {I: Int | (I < 5 or I != 3) and I != 4} = 4 # ERR