Function pointers are not getting monormophized fully about gccrs HOT 1 OPEN

struct Formatter;
struct Result;

trait FakeDisplay {
    fn fmt(&self, f: &mut Formatter) -> Result;
}

impl FakeDisplay for i32 {
   fn fmt(&self, _: &mut Formatter) -> Result { Result }
}

struct Argument;

impl Argument {
    pub fn new<'a, T>(value: &'a T, formatter: fn(&T, &mut Formatter) -> Result) -> Argument {
        Argument
    }
}

fn main() {
    let a = Argument::new(&15, FakeDisplay::fmt);
}