File: early-vtbl-resolution.rs

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rustc 1.85.0%2Bdfsg3-1
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//@ run-pass

#![allow(non_camel_case_types)]
#![allow(dead_code)]

trait thing<A> {
    fn foo(&self) -> Option<A>;
}
impl<A> thing<A> for isize {
    fn foo(&self) -> Option<A> { None }
}
fn foo_func<A, B: thing<A>>(x: B) -> Option<A> { x.foo() }

struct A { a: isize }

pub fn main() {
    let _x: Option<f64> = foo_func(0);
}