File: E0499.rs

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rustc 1.41.1%2Bdfsg1-1~deb10u1
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fn main() {
    let mut i = 0;
    let mut x = &mut i;
    let mut a = &mut i; //~ ERROR E0499
    a.use_mut();
    x.use_mut();
}

trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { }  }
impl<T> Fake for T { }