Doesn't compile
Aporia: 253d55e
nimrod: 0.9.2 release
`nimrod c aporia.nim` 

```
search.nim(215, 4) Hint: 1446 [Processing]
search.nim(232, 4) Hint: 1448 [Processing]
search.nim(211, 9) Error: internal error: expr(nkYieldStmt); unknown node kind
      yield (startMatch, endMatch)
           ^
No stack traceback available
No stack traceback available
```

The module declaration is an iterator and the yield arguments match.

Is this a nimrod issue?  (Retrying with nimrod head @ 9c56633 ITMT)
