#18184: CombinatorialObject constructor should copy input
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Reporter: jdemeyer | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.6
Component: combinatorics | Keywords:
Merged in: | Authors: Jeroen Demeyer
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Constructing a `Partition` (or more generally, a `CombinatorialObject`)
from a list does not copy this list, leading to:
{{{
sage: L = IntegerListsLex(max_slope=-1, element_class=Partition)
sage: x = [3,2,1]
sage: P = L(x)
sage: x[0] = 5
sage: list(P)
[5, 2, 1]
}}}
In the `IntegerListsLex` implementation in #17979, a work-around was added
for this. Instead, fix this by copying the input.
--
Ticket URL: <http://trac.sagemath.org/ticket/18184>
Sage <http://www.sagemath.org>
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