Sometimes Infinite Recursion leads to stack overflow in Python 3
Closed this issue · 1 comments
pbrady commented
Ran into this again here but I can't reproduce it with a simple example:
$ python
Python 3.4.1 |Continuum Analytics, Inc.| (default, May 19 2014, 13:02:41)
[GCC 4.1.2 20080704 (Red Hat 4.1.2-54)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from fastcache import clru_cache, __version__
>>> __version__
'0.4.2'
>>> @clru_cache()
... def f(a):
... return f(a-1)
...
>>> f(1)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
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File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
File "<stdin>", line 3, in f
RuntimeError: maximum recursion depth exceeded while calling a Python object
>>> Does this have something to do with unwinding more complicated stacks?
pbrady commented
The failure in sympy occurs when comparing elements of the cache for equality, not in the call to the cached function... the above test should be modified