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joblib doesn't propogate correct exception, raises SyntaxError instead

See original GitHub issue

Whereas multiprocessing propagates the RuntimeError: Error during user-specified initialization

joblib generates a very strange SyntaxError – I have no idea how I could specify an encoding in a compiled extension!

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ERROR: test_user_init_unspecified (pystan.tests.test_problems.TestStanfit)
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Traceback (most recent call last):
  File "/home/abr/documents/pystan/pystan-ariddell/pystan/tests/test_problems.py", line 30, in test_user_init_unspecified
    pystan.stan(model_code=model_code, iter=10, chains=1, seed=2, data=data, init=[dict(mu=4)], warmup=0)
  File "/home/abr/documents/pystan/pystan-ariddell/pystan/api.py", line 321, in stan
    n_jobs=n_jobs, **kwargs)
  File "/home/abr/documents/pystan/pystan-ariddell/pystan/model.py", line 650, in sampling
    ret_and_samples = Parallel(n_jobs)(delayed(call_sampler_star)(args) for args in call_sampler_args)
  File "/home/abr/documents/pystan/pystan-ariddell/pystan/external/joblib/parallel.py", line 602, in __call__
    self.retrieve()
  File "/home/abr/documents/pystan/pystan-ariddell/pystan/external/joblib/parallel.py", line 480, in retrieve
    self._output.append(job.get())
  File "/usr/lib/python3.3/multiprocessing/pool.py", line 564, in get
    raise self._value
nose.proxy.SyntaxError: invalid or missing encoding declaration for '/tmp/tmp5pc7xw/pystan/stanfit4anon_model_652395f2575ceb009e57546b592d498e.cpython-33m.so'