Cannot Compile on Ubuntu 13.04 (64bit)
Hey all

Looked through the issues list, saw other people with the same problem on Mac and another platform (wasn't stated) but no answer on how to get around it.

Running Ubuntu 13.04 64bit, I've got Nimrod compiled from the git HEAD (0.9.3 I believe) and Aporia HEAD as well, and still no luck. The error I get is:

```
search.nim(211, 4) Error: internal error: expr(nkYieldStmt); unknown node kind
No stack traceback available
```

Any ideas on what the issue is? I tried moving back to some previous Tags and still had no luck :(

Cheers
