#9880: Segfault in PyNaC 0.2.0.p4
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Reporter: jpflori | Owner: burcin
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.7.1
Component: symbolics | Keywords: pynac
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by burcin):
Replying to [comment:44 kcrisman]:
> What remains for 'needs review' so one could review it?
Volker has changes to pynac to fix simplification of expressions involving
infinity when we can't assume anything about the internal ordering.
I am trying to fix printing of `mul` objects where we get `-` right after
a parenthesis, such as `-(4*cos(x)^2 - 1)*sin(x)/(-4*cos(x)^3 +
3*cos(x))`.
It might be good to update my [attachment:trac_9880-stable_operands.patch]
to make it optional to use the printing order.
Then a lot of doctests need to get fixed. We also need to document that
`.find()`, `.match()` and friends will not return results in a canonical
order any more and that expressions constructed with `hold =True` do not
print in the order provided by the user.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9880#comment:45>
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