conflict with matplotlib.pyplot

Reproduce el ejemplo proporcionado de Python 3.6 con matplotlib.pyplot, ArrayFire, la operación aritmética y data.join. Inspecciona arrayfire/data.py en join, arrayfire/util.py en safe_call y la ruta indicada src/backend/cuda/jit.cpp para determinar por qué el orden de importación cambia el fallo de JIT; se considera terminado cuando el reproductor ya no produce errores sin requerir una solución basada en el orden de importación.

These codes will trigger an error in just in time compiler

import matplotlib; matplotlib.use('Agg')
import matplotlib.pyplot as plt
import arrayfire as af

a = af.data.range( 640, 1280, dim=0 )
b = af.data.range( 640, 1280, dim=0 ) - 1

af.data.join(0,a,b,)

and the error output is

Traceback (most recent call last):
  File "test.py", line 8, in <module>
    af.data.join(0,a,b,)
  File "/home/herbert/anaconda3/lib/python3.6/site-packages/arrayfire/data.py", line 320, in join
    safe_call(backend.get().af_join(c_pointer(out.arr), dim, first.arr, second.arr))
  File "/home/herbert/anaconda3/lib/python3.6/site-packages/arrayfire/util.py", line 79, in safe_call
    raise RuntimeError(to_str(err_str))
RuntimeError: In function std::vector<char> cuda::compileToPTX(const char*, std::string)
In file src/backend/cuda/jit.cpp:

However, without any major change, the following two will not,

# change the import order between pyplot and arrayfire

import matplotlib; matplotlib.use('Agg')
import arrayfire as af
import matplotlib.pyplot as plt

a = af.data.range( 640, 1280, dim=0 )
b = af.data.range( 640, 1280, dim=0 ) - 1

af.data.join(0,a,b,)

or

# do not perform the arithmetic operation on one of the array  

import matplotlib; matplotlib.use('Agg')
import matplotlib.pyplot as plt
import arrayfire as af

a = af.data.range( 640, 1280, dim=0 )
b = af.data.range( 640, 1280, dim=0 )

af.data.join(0,a,b,)

Here is my python environment obtained by running python in a terminal.

Python 3.6.8 |Anaconda, Inc.| (default, Dec 30 2018, 01:22:34) 
[GCC 7.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.