pub fn spawn_unlinked(f: ~fn())
Creates a child task unlinked from the current one. If either this task or the child task fails, the other will not be killed.
Prefix searches with a type followed by a colon (e.g.
fn:) to restrict the search to a given type.
Accepted types are: fn, mod,
struct (or str), enum,
trait, typedef (or
tdef).