vendor/rustc-rayon/src/compile_fail/cell_par_iter.rs

/*! ```compile_fail,E0277

// Check that we can't use the par-iter API to access contents of a `Cell`.

use rayon::prelude::*;
use std::cell::Cell;

fn main() {
    let c = Cell::new(42_i32);
    (0_i32..1024).into_par_iter()
             .map(|_| c.get()) //~ ERROR E0277
             .min();
}

``` */