Segfault with | (or) and tuples and strs in match

[Dretch]

The following code compiles:

fn main() {
    match ((1, ~"a"), (2, ~"b")) {
        ((1, a), (2, b)) |
        ((2, b), (1, a)) => {
            println(a);
            println(b);
        },
        _ => fail!(),
    }
}

But when it runs if fails like so (on 64 bit linux):

b
Segmentation fault (core dumped)

Note that it prints "b" before segfaulting, but that is actually incorrect - the first println should print "a".

[emberian]

Reproduced

[dim-an]

The same problem here:

fn main() {
    match (1, 2, 3) {
        (1, a, b) | (2, b, a) => {
                printfln!(a);
                printfln!(b);
            },
            _ => fail!(),
    }
}

This code unexpectedly outputs:

3
3

The problem (as I understand it), is in variable binding. We bind variables for both patterns in the same arm, and different pattern overwrite each other.

I will try to fix it in the nearest future.