src/test/ui/issues/issue-53498.rs

pub mod test {
    pub struct A;
    pub struct B;
    pub struct Foo<T>(T);

    impl Foo<A> {
        fn foo() {}
    }

    impl Foo<B> {
        fn foo() {}
    }
}

fn main() {
    test::Foo::<test::B>::foo(); //~ ERROR associated function `foo` is private
}