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    /*! ```compile_fail,E0599

    use rayon::prelude::*;

    // zip requires data of exact size, but filter yields only bounded
    // size, so check that we cannot apply it.

    fn main() {
        let a: Vec<usize> = (0..1024).collect();
        let mut v = vec![];
        a.par_iter()
         .filter_map(|&x| Some(x as f32))
         .collect_into_vec(&mut v); //~ ERROR no method
    }

    ``` */

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