# bug #1638

import unsigned

let v1 = 7
let v2 = 7'u64

let t1 = v1 mod 2 # works
let t2 = 7'u64 mod 2'u64 # works
let t3 = v2 mod 2'u64 # Error: invalid type: 'range 0..1(uint64)
let t4 = (v2 mod 2'u64).uint64 # works