rust/src/test/run-fail/unwind-lambda.rs

// error-pattern:fail

fn main() {
    let cheese = "roquefort";
    let carrots = @"crunchy";

    fn@(tasties: @str, macerate: fn(str)) {
        macerate(*tasties);
    } (carrots, { |food|
        let mush = food + cheese;
        let f = fn@() {
            let chew = mush + cheese;
            fail "so yummy"
        };
        f();
    });
}