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// Regression test for #52057. There is an implied bound
// that `I: 'x` where `'x` is the lifetime of the reference `&mut Self::Input`
// in `parse_first`; but to observe that, one must normalize first.
//
// run-pass
pub trait Parser {
type Input;
fn parse_first(input: &mut Self::Input);
}
impl<'a, I, P: ?Sized> Parser for &'a mut P
where
P: Parser<Input = I>,
{
type Input = I;
fn parse_first(_: &mut Self::Input) {}
}
fn main() {}
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