rust/src/test/compile-fail/arc-rw-write-mode-cond-shouldnt-escape.rs

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// error-pattern: reference is not valid outside of its lifetime
use std;
import std::arc;
fn main() {
let x = ~arc::rw_arc(1);
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let mut y = None;
do x.write_downgrade |write_mode| {
do (&write_mode).write_cond |_one, cond| {
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y = Some(cond);
}
}
option::unwrap(y).wait();
}