[PATCH 2 of 3 in crew] parsers: use Py_INCREF safely

[Siddharth Agarwal]

On 09/16/2013 12:36 PM, Antoine Pitrou wrote:
> Are you sure about that?
> I can't think of a situation where you'd want to incref something after
> untracking it

Python's GC (which is actually just a cycle collector) is different from 
its refcounting implementation. All Python objects have a refcount, but 
only some container objects are tracked by the GC. We call 
PyObject_GC_Untrack because we know that entry cannot take part in a cycle.