Segmentation fault in python 3

``` python
Python 3.4.2 (default, Nov 19 2014, 14:32:26) 
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.54)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import ujson;ujson.encode('\ud83d\ude80')
Segmentation fault: 11
```

it works in python2.7, but not python 3
Any idea how to fix it?
