Ihor Radchenko <yantar92@posteo.net> writes:

> [ CCing ob-python maintainer ]
>
> Nasser Alkmim <nasser.alkmim@gmail.com> writes:
>
>> Here is a clearer description of the unwanted behavior:
>>
>> 1. emacs -Q ~/Desktop/testasync.org
>>
>> Then evaluate (require 'ob-python) and paste this source block:
>>
>> #+begin_src python :dir otherdir :async yes :session pysession :return figname :results file value :mkdirp yes
>> import matplotlib.pyplot as plt
>> plt.figure(figsize=(1, 1))
>> plt.plot([1, 2])
>> figname = 'fig.svg'
>> plt.savefig(figname)
>> #+end_src
>>
>> Execute the source block, which results in 
>>
>> #+RESULTS:
>> [[file:fig.svg]]
>
> I don't even see this.
> Confirmed.

Does the attached patch fix the issue?

It seems the problem is with async sessions generally (not just
ob-python), and happens because `org-babel-comint-async-filter' does not
set `default-directory' before calling `org-babel-insert-result', unlike
`org-babel-execute-src-block'.