#194 memory leak in python hfst transducer

[Flammie Pirinen]

If I run context-checks.py of omorfi using fiwiki, gutenberg and europarl, it segfaults half way through, but if I add:

    omorfi = None
    omorfi = load_omorfi('../src/morphology.omor.hfst')

between the corpora, it runs to the end. load_omorfi(path) being:

    if access(path, F_OK):
        res = libhfst.HfstTransducer(libhfst.HfstInputStream(path))

I suspect there is something that gathers memory to HfstTransducer structures when doing lookup that gets released when python's garbage collector snipes omorfi.