Prevent catastrophic failures from resulting in no results about otter-grader HOT 6 CLOSED

Running your submission against local test cases...


C:\Users\ColeNelson\anaconda3\Lib\site-packages\zmq\_future.py:679: RuntimeWarning: Proactor event loop does not implement add_reader family of methods required for zmq. Registering an additional selector thread for add_reader support via tornado. Use `asyncio.set_event_loop_policy(WindowsSelectorEventLoopPolicy())` to avoid this warning.
  self._get_loop()
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\ColeNelson\anaconda3\Lib\site-packages\otter\check\validate_export\__main__.py", line 46, in <module>
    main()
  File "C:\Users\ColeNelson\anaconda3\Lib\site-packages\otter\check\validate_export\__main__.py", line 31, in main
    results = grade_notebook(
              ^^^^^^^^^^^^^^^
  File "C:\Users\ColeNelson\anaconda3\Lib\site-packages\otter\execute\__init__.py", line 103, in grade_notebook
    results = pickle.load(ntf)
              ^^^^^^^^^^^^^^^^
EOFError: Ran out of input

---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
Cell In[16], line 2
      1 # Save your notebook first, then run this cell to export your submission.
----> 2 grader.export(pdf=False, run_tests=True)

File ~\anaconda3\Lib\site-packages\otter\check\utils.py:166, in grading_mode_disabled(wrapped, self, args, kwargs)
    164 if type(self)._grading_mode:
    165     return
--> 166 return wrapped(*args, **kwargs)

File ~\anaconda3\Lib\site-packages\otter\check\utils.py:153, in incompatible_with.<locals>.incompatible(wrapped, self, args, kwargs)
    151     else:
    152         return
--> 153 return wrapped(*args, **kwargs)

File ~\anaconda3\Lib\site-packages\otter\check\utils.py:203, in logs_event.<locals>.event_logger(wrapped, self, args, kwargs)
    201 except Exception as e:
    202     self._log_event(event_type, success=False, error=e)
--> 203     raise e
    205 else:
    206     self._log_event(event_type, results=results, question=question, shelve_env=shelve_env)

File ~\anaconda3\Lib\site-packages\otter\check\utils.py:197, in logs_event.<locals>.event_logger(wrapped, self, args, kwargs)
    194     question, results, shelve_env = wrapped(*args, **kwargs)
    196 else:
--> 197     results = wrapped(*args, **kwargs)
    198     shelve_env = {}
    199     question = None

File ~\anaconda3\Lib\site-packages\otter\check\notebook.py:447, in Notebook.export(self, nb_path, export_path, pdf, filtering, pagebreaks, files, display_link, force_save, run_tests)
    444         display(HTML(out_html))
    446 if pdf_created or not otter_nb_config.get(REQUIRE_CONFIRMATION_NO_PDF_EXPORT_KEY, False):
--> 447     continue_export()
    448 else:
    449     display_pdf_confirmation_widget(
    450         otter_nb_config.get(NO_PDF_EXPORT_MESSAGE_KEY), continue_export)

File ~\anaconda3\Lib\site-packages\otter\check\notebook.py:429, in Notebook.export.<locals>.continue_export()
    427 if run_tests:
    428     print("Running your submission against local test cases...\n")
--> 429     results = grade_zip_file(zip_path, nb_path, self._path)
    430     print(
    431         "Your submission received the following results when run against " + \
    432         "available test cases:\n\n" + indent(results.summary(), "    "))
    434 if display_link:
    435     # create and display output HTML

File ~\anaconda3\Lib\site-packages\otter\check\utils.py:91, in grade_zip_file(zip_path, nb_arcname, tests_dir)
     88 print(results.stderr.decode("utf-8"))
     90 if results.stderr:
---> 91     raise RuntimeError(results.stderr)
     93 with open(results_path, "rb") as f:
     94     results = dill.load(f)

RuntimeError: b'C:\\Users\\ColeNelson\\anaconda3\\Lib\\site-packages\\zmq\\_future.py:679: RuntimeWarning: Proactor event loop does not implement add_reader family of methods required for zmq. Registering an additional selector thread for add_reader support via tornado. Use `asyncio.set_event_loop_policy(WindowsSelectorEventLoopPolicy())` to avoid this warning.\r\n  self._get_loop()\r\nTraceback (most recent call last):\r\n  File "<frozen runpy>", line 198, in _run_module_as_main\r\n  File "<frozen runpy>", line 88, in _run_code\r\n  File "C:\\Users\\ColeNelson\\anaconda3\\Lib\\site-packages\\otter\\check\\validate_export\\__main__.py", line 46, in <module>\r\n    main()\r\n  File "C:\\Users\\ColeNelson\\anaconda3\\Lib\\site-packages\\otter\\check\\validate_export\\__main__.py", line 31, in main\r\n    results = grade_notebook(\r\n              ^^^^^^^^^^^^^^^\r\n  File "C:\\Users\\ColeNelson\\anaconda3\\Lib\\site-packages\\otter\\execute\\__init__.py", line 103, in grade_notebook\r\n    results = pickle.load(ntf)\r\n              ^^^^^^^^^^^^^^^^\r\nEOFError: Ran out of input\r\n'