rustc.exe does not reset PowerShell colors after compilation error

# Version

```
PS C:\Users\Andrew McKinlay> rustc -v
rustc 0.12.0 (ba4081a5a 2014-10-07 13:44:41 -0700)
```

(I believe this issue occurs in the nightly, too)
# Problem

![](https://cloud.githubusercontent.com/assets/1351003/4607321/c6fef012-524a-11e4-83b9-59c9a5a9db67.PNG)
# Related issues
#17416?
