Onyx - tagged unions undefined behavior

main.onyx

use core { println }

Item :: struct {
    value: str;
}

Other :: struct {
    value: i32;
}

Container :: union {
    Item: Item;
    Other: Other;
}

createItem :: (v: str) -> &Container {
    i := Item.{value = v };
    c := Container.{Item = i};
    return &c;
}

createOther :: (v: i32) -> &Container {
    o := Other.{ value = v };
    c := Container.{Other = o};
    return &c;
}

main :: () {
    // Creating two containers that are owned by the createOther proc
    // results in each being an "unknown_variant" value
    //
    // Try running this example with lines relating to `c2` commented.
    c1 := createItem("test");
    c2 := createOther(123);
    println(*c1);
    println(*c2);
}