Function return does not always perform a move #995
Description
This is a problem for unique pointers
use std;
import std::unsafe;
fn f(addr: @mutable int) -> ~int {
let i = ~100;
let a: int = unsafe::reinterpret_cast(i);
log a;
*addr = a;
// Since i is not a temporary it gets copied, which is not what you expect
ret i;
}
fn main() {
let addr = @mutable 0;
let i <- f(addr);
let expected = *addr;
let actual: int = unsafe::reinterpret_cast(i);
log expected;
log actual;
assert expected == actual;
}