Exception Raising with HDF5-related file manipulation ends in segfault

Created by: anjos

This example will trigger it:

import bob
f = bob.io.HDF5File('test.hdf5', 't')
f.set('bla', 3)
del f
m = bob.machine.LinearMachine(3,3)
# saving on read-only file, exception is raised and then Python segfaults on exit()
m.save(bob.io.HDF5File('test.hdf5'))