File: impl-method-mismatch.rs

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rustc 1.85.0%2Bdfsg3-1
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trait Mumbo {
    fn jumbo(&self, x: &usize) -> usize;
}

impl Mumbo for usize {
    // Cannot have a larger effect than the trait:
    unsafe fn jumbo(&self, x: &usize) { *self + *x; }
    //~^ ERROR method `jumbo` has an incompatible type for trait
    //~| expected signature `fn
    //~| found signature `unsafe fn
}

fn main() {}