412a07055c
`uint::range_step` or `int::range_step` causes overflow or underflow as following.
code:
```rust
fn main() {
for uint::range_step(3, 0, -2) |n| {
println(fmt!("%u", n));
}
}
```
output:
```
3
1
18446744073709551615
18446744073709551613
...
```
This commit fixes this behavior as follows.
```
3
1
```
|
||
|---|---|---|
| .. | ||
| int-template | ||
| uint-template | ||
| cmath.rs | ||
| f32.rs | ||
| f64.rs | ||
| float.rs | ||
| int-template.rs | ||
| num.rs | ||
| strconv.rs | ||
| uint-template.rs | ||