extern mod std; 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; return quux; } fn main() { let x = @{a: 1, b: 2, c: 3}; let y = test(x); assert (y.c == 3); }