src/tools/rustfmt/tests/source/issue-1366.rs


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fn main() {
    fn f() -> Option<i32> {
        Some("fffffffsssssssssddddssssfffffddddff").map(|s| s).map(|s| s.to_string()).map(|res| {
            match Some(res) {
                Some(ref s) if s == "" => 41,
                Some(_) => 42,
                _ => 43,
            }
        })
    }
    println!("{:?}", f())
}