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pypy/Twisted incompatibility

See original GitHub issue

Hi,

I tried running a few of our internal tests using the latest pypy (version 5.10), and hit a compatibility issue with the Twisted Failure object():

from tblib import pickling_support
pickling_support.install()

import six, pickle, sys
from twisted.python.failure import Failure

try:
	raise ValueError
except ValueError:
	s = pickle.dumps(sys.exc_info())

try:
	six.reraise(*pickle.loads(s))
except ValueError:
	f = Failure()

print('F', f)

This works on both Python 2.7.13, 3.6.3, but not the latest pypy. The error output was:

Traceback (most recent call last):
  File "twisted_six.py", line 10, in <module>
    s = pickle.dumps(sys.exc_info())
  File "/home/arni/dohop/pypy-5.10.0-linux_x86_64-portable/lib-python/2.7/pickle.py", line 1431, in dumps
    Pickler(file, protocol).dump(obj)
  File "/home/arni/dohop/pypy-5.10.0-linux_x86_64-portable/lib-python/2.7/pickle.py", line 224, in dump
    self.save(obj)
  File "/home/arni/dohop/pypy-5.10.0-linux_x86_64-portable/lib-python/2.7/pickle.py", line 286, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/arni/dohop/pypy-5.10.0-linux_x86_64-portable/lib-python/2.7/pickle.py", line 570, in save_tuple
    save(element)
  File "/home/arni/dohop/pypy-5.10.0-linux_x86_64-portable/lib-python/2.7/pickle.py", line 292, in save
    rv = reduce(obj)
  File "/home/arni/dohop/virtualenvs/pypy_5_10/site-packages/tblib/pickling_support.py", line 20, in pickle_traceback
    return unpickle_traceback, (Frame(tb.tb_frame), tb.tb_lineno, tb.tb_next and Traceback(tb.tb_next))
  File "/home/arni/dohop/virtualenvs/pypy_5_10/site-packages/tblib/__init__.py", line 54, in __init__
    self.f_back = Traceback(frame.f_back)
  File "/home/arni/dohop/virtualenvs/pypy_5_10/site-packages/tblib/__init__.py", line 69, in __init__
    self.tb_frame = Frame(tb.tb_frame)
AttributeError: 'NoneType' object has no attribute 'tb_frame'

Issue Analytics

State:
Created 6 years ago
Comments:6 (5 by maintainers)

Top GitHub Comments

1reaction

ionelmccommented, May 2, 2019

@arnimarj there is indeed a problem with Twisted that will be fixed. However the traceback you pasted doesn’t match the code in the 1.3.2 release: https://github.com/ionelmc/python-tblib/blob/v1.3.2/src/tblib/__init__.py#L54

0reactions

ionelmccommented, May 2, 2019

Released v1.4.0.

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