#18944: Posets: maximal_chains() partial-option broken
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       Reporter:  jmantysalo         |        Owner:
           Type:  defect             |       Status:  needs_work
       Priority:  major              |    Milestone:  sage-6.9
      Component:  combinatorics      |   Resolution:
       Keywords:  posets             |    Merged in:
        Authors:  Jori Mäntysalo     |    Reviewers:
Report Upstream:  N/A                |  Work issues:
         Branch:                     |       Commit:
  u/jmantysalo/maximal_chains        |  e6a4ae2b1f7f887b58a49af5c1607640c7821dde
   Dependencies:                     |     Stopgaps:
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Changes (by tscrim):

 * status:  needs_review => needs_work
 * milestone:  sage-6.8 => sage-6.9


Comment:

 I agree with Kevin, bad input is bad input and you should not expect
 correct behavior. So there is no counterexample to the function working as
 documented, but we should raise an error when not given a saturated chain.

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Ticket URL: <http://trac.sagemath.org/ticket/18944#comment:9>
Sage <http://www.sagemath.org>
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