Bugs item #1233578, was opened at 2005-07-06 10:03
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Category: Python Library
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Submitted By: Charles (melicertes)
Assigned to: Nobody/Anonymous (nobody)
Summary: Pickle protocols 1, 2 can't handle "inf" floats.
Initial Comment:
Python 2.4.1 on an AMD64 system. The pickle module
barfs with a "SystemError: frexp() result out of range"
if an "inf" float value is pickled with pickle protocol
1 or 2. It works fine with the old protocol 0.
Minimal test case:
>>> import pickle
>>> o = 2e308
>>> print o
inf
>>> pickle.dumps(o, protocol=0)
'Finf\n.'
>>>
>>> pickle.dumps(o, protocol=1)
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "/usr/lib/python2.4/pickle.py", line 1386, in dumps
Pickler(file, protocol, bin).dump(obj)
File "/usr/lib/python2.4/pickle.py", line 231, in dump
self.save(obj)
File "/usr/lib/python2.4/pickle.py", line 293, in save
f(self, obj) # Call unbound method with explicit self
File "/usr/lib/python2.4/pickle.py", line 489, in
save_float
self.write(BINFLOAT + pack('>d', obj))
SystemError: frexp() result out of range
>>>
>>> pickle.dumps(o, protocol=2)
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "/usr/lib/python2.4/pickle.py", line 1386, in dumps
Pickler(file, protocol, bin).dump(obj)
File "/usr/lib/python2.4/pickle.py", line 231, in dump
self.save(obj)
File "/usr/lib/python2.4/pickle.py", line 293, in save
f(self, obj) # Call unbound method with explicit self
File "/usr/lib/python2.4/pickle.py", line 489, in
save_float
self.write(BINFLOAT + pack('>d', obj))
SystemError: frexp() result out of range
----------------------------------------------------------------------
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