File: impl-generic-mismatch-ab.rs

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rustc 1.87.0%2Bdfsg1-1
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use std::fmt::Debug;

trait Foo {
    fn foo<A: Debug>(&self, a: &A, b: &impl Debug);
}

impl Foo for () {
    fn foo<B: Debug>(&self, a: &impl Debug, b: &B) { }
    //~^ ERROR method `foo` has an incompatible type for trait
}

fn main() {}