#13998: hash of a pickled Sequence is broken
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Reporter: slabbe | Owner: slabbe
Type: defect | Status: new
Priority: major | Milestone: sage-5.7
Component: pickling | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by slabbe):
Here is a way to reproduce the problem on a recent version of Sage:
{{{
sage: S = Sequence([])
sage: S.set_immutable()
sage: del S._Sequence_generic__hash
sage: hash(S)
Traceback (most recent call last):
...
AttributeError: 'Sequence_generic' object has no attribute
'_Sequence_generic__hash'
sage:
sage: S._Sequence__hash = 34 # providing this value should fix the above
error but it doesn't:
sage: hash(S)
Traceback (most recent call last):
...
AttributeError: 'Sequence_generic' object has no attribute
'_Sequence_generic__hash'
}}}
This is what I am going to use to doctest the fix.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13998#comment:1>
Sage <http://www.sagemath.org>
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