'times' Iterating incorrect number of times

[doublec]

The following code using 'times' only prints 44 lines, whereas I'd expect it to print 300 lines.

use std;

fn main() {
        for 300.times {
            io::println("Here's some Rust!");
        }
}

Replacing '300' with 300u prints 300 lines:

use std;

fn main() {
        for 300u.times {
            io::println("Here's some Rust!");
        }
}

Tested with rust incoming branch:

$ rustc test.rs
$ ./test |wc -l
44

[brson]

I wonder if the 300 is getting inferred to an i8.

[brson]

Here's a self-contained test case:

trait Times2 {
    pure fn times2(it: fn() -> bool);
}


impl i8: Times2 {
    pure fn times2(it: fn() -> bool) {
        let mut i = self;
        while i > 0 {
            if !it() { break }
            i -= 1;
        }
    }
}

impl int: Times2 {
    pure fn times2(it: fn() -> bool) {
        let mut i = self;
        while i > 0 {
            if !it() { break }
            i -= 1;
        }
    }
}

fn main() {
    let mut i = 0;
    for 300.times2 {
        i += 1;
    }

    assert i == 300;
}

If you change the order of impl declarations it works.

[nikomatsakis]

I believe this is a dup of (or, rather, a consequence of) #3211