using 'self in return values doesn't appear to require a 'self parameter

[thestinger]

as shown by https://github.com/mozilla/rust/pull/5670/files

I was already using 'self in the return values for find and find_mut in the Map trait.

I'm not entirely sure this is a bug.... but it's an inconsistency.

[nikomatsakis]

It's a bug, if a minor one. cc #4846

[graydon]

This testcase:

fn main() { }
struct Foo { x: int }
impl Foo {
    fn bleh(&self) -> &'self int {
        return &self.x
    }
}

Now produces the error:

t.rs:4:29: 4:32 error: Illegal lifetime 'self: the `self` lifetime must be declared
t.rs:4     fn bleh(&self) -> &'self int {
                                    ^~~

And the error goes away if I change the impl to:

impl<'self> Foo {
    fn bleh(&'self self) -> &'self int {
        return &self.x
    }
}

So I'm going to say this is closed. Reopen if I misunderstood.