File: repeating_param.rs

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rustc 1.87.0%2Bdfsg1-1
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// Test that specializing on two type parameters being equal is not allowed.

#![feature(min_specialization)]

trait X {
    fn f();
}

impl<T> X for T {
    default fn f() {}
}
impl<T> X for (T, T) {
    //~^ ERROR specializing impl repeats parameter `T`
    fn f() {}
}

fn main() {}