rust/src/test/compile-fail/regions-infer-invariance-due-to-mutability.rs

struct invariant {
    mut f: &int
}

fn to_same_lifetime(bi: invariant/&r) {
    let bj: invariant/&r = bi;
}

fn to_shorter_lifetime(bi: invariant/&r) {
    let bj: invariant/&blk = bi; //~ ERROR mismatched types
}

fn to_longer_lifetime(bi: invariant/&r) -> invariant/&static {
    bi //~ ERROR mismatched types
}

fn main() {
}