Hi, The following code (also attached as a .pyx file) fails in the current Cython :
cdef class test:
pass
def main():
cdef test a, b, c, d
(a, b) = (c, d) = (None, None)
When run, I get the following traceback:
In [1]: import assign_test
In [2]: assign_test.main()
Traceback (most recent call last):
File "<ipython-input-2-c2f7599d7b34>", line 1, in <module>
assign_test.main()
File "assign_test.pyx", line 6, in assign_test.main (assign_test.c:669)
(a, b) = (c, d) = (None, None)
TypeError: Cannot convert NoneType to assign_test.test
I am using the latest Cython development version (from github). Also
tested with Cython 0.18.
$ git rev-parse HEAD
e8bd1789905a58d8224e4be5019be401f360aa54
I don't get an error when I change the assignments to either:
(a, b) = (None, None)
or
a = b = None
Is this a bug in Cython? I tried doing a git bisect and it seems like
commit ea6a71acb5c79afb080855be1cb6ca30d283ec25 is when the above code
started failing (It works with the previous commit).
Thanks,
Alok
assign_test.pyx
Description: Binary data
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