I'm still trying to track down the errors I had earlier this week, but
in the meantime, we've found a bigger one. PyTables crashes when
opening a file with an attribute of the root node with the value "0.".
It can write attributes like that fine, but when it tries to read
there's a crash.
I've tracked the problem down to a bug in Python 2.6.4's cPickle
module. Until Python fixes the bug (it might be fixed already in 2.7, I
don't know), would it make sense to add a parameter to shut off
automatic depickling of attributes?
Here's a history of my simple test:
$ ipython
In [1]: import tables
In [2]: fyle = tables.openFile("crash_test.h5",mode="a")
In [3]: fyle.root._v_attrs
Out[3]:
/._v_attrs (AttributeSet), 4 attributes:
[CLASS := 'GROUP',
PYTABLES_FORMAT_VERSION := '2.0',
TITLE := '',
VERSION := '1.0']
In [4]: fyle.root._v_attrs.trouble = "0."
In [5]: fyle.root._v_attrs
Out[5]:
/._v_attrs (AttributeSet), 5 attributes:
[CLASS := 'GROUP',
PYTABLES_FORMAT_VERSION := '2.0',
TITLE := '',
VERSION := '1.0',
trouble := '0.']
In [6]: fyle.close()
In [7]:
Do you really want to exit ([y]/n)?
$ ipython
In [1]: import tables
In [2]: fyle = tables.openFile("crash_test.h5")
Segmentation fault (core dumped)
$ ipython
In [1]: import cPickle
In [2]: cPickle.loads("0.")
Segmentation fault (core dumped)
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