A cloned slice can escape the scope where it is valid.

[shepmaster]

This code compiles successfully, but doesn't seem like it should:

fn main() {
    let mut view;

    {
        let array2 = vec![4i, 5, 6];
        view = array2.as_slice().clone();
    }

    // Do not expect view to be valid here. Removing `clone` above makes this an error.

    println!("{}", view);
}

Version:

$ rustc --version=verbose
rustc 0.13.0-dev (358db12a8 2014-12-06 17:42:16 +0000)
binary: rustc
commit-hash: 358db12a89d6edf4a61cb3c8d170449faea925cc
commit-date: 2014-12-06 17:42:16 +0000
host: x86_64-apple-darwin
release: 0.13.0-dev

[shepmaster]

Seems like a dup of #19261

[Fabiensk]

Note that if we replace the .clone() by a .slice_from(0), then it does not compile any more (as I would expect):

error: array2 does not live long enough