use std; import uint; fn test(foo: ~{a: int, b: int, c: int}) -> ~{a: int, b: int, c: int} { let foo = foo; let bar <- foo; let baz <- bar; let quux <- baz; ret quux; } fn main() { let x = ~{a: 1, b: 2, c: 3}; let y = test(x); assert (y.c == 3); }