trans_put - 'non-exhaustive match failure'

[jruderman]

rt: 9736:main:main: upcall fail 'non-exhaustive match failure', ../src/comp/middle/trans.rs:6572

iter under(uint hi) -> uint {
    let uint y = 0u;
    while (y < hi) {
        put y;
        y += 1u;
    }
}

iter several_zeroes() {
    for each (uint i in under(3u)) {
        put 0u;
    }
}

[jruderman]

Better testcase, still shows this bug after the fix for issue 638:

iter under(uint hi) -> uint {
    let uint y = 0u;
    while (y < hi) {
        put y;
        y += 1u;
    }
}

iter several_zeroes() -> uint {
    for each (uint i in under(3u)) {
        put 0u;
    }
}