#18514: Upgrade of group cohomology spkg
-------------------------------------+-------------------------------------
       Reporter:  SimonKing          |        Owner:
           Type:  defect             |       Status:  needs_work
       Priority:  major              |    Milestone:  sage-6.8
      Component:  packages:          |   Resolution:
  optional                           |    Merged in:
       Keywords:  group cohomology   |    Reviewers:
        Authors:  Simon King         |  Work issues:  Create a new-style
Report Upstream:  None of the above  |  package with least effort
  - read trac for reasoning.         |       Commit:
         Branch:                     |     Stopgaps:
   Dependencies:  #18494             |
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Comment (by SimonKing):

 Replying to [comment:51 SimonKing]:
 > - It seems that since a while, web access during doctests is not
 possible. It used to work, and the failing tests do work in interactive
 sessions. No idea how that could be fixed; I guess it was caused by a
 change in the doctest framework.

 Strangely, these tests worked on my laptop. Is it possible that "screen"
 (which I use on the office computer) prevents internet access during
 doctests?

 > - There have still been deprecation warnings when unpickling old pickled
 cohomology rings. Whether or not we will see the deprecation warning
 depends on the user: If (s)he has old pickles, then the tests will fail.
 If (s)he removes the old pickles before re-installing the package, then
 the tests will work.

 Question to the reviewer: Should one add a remark in the documentation,
 telling that a certain deprecation warning is expected if old data is
 present?

 > - There has been one error where a different homogeneous system of
 parameters was found. Mathematically there is no substantial difference,
 but it may be needed to change the expected output.

 I get the same on my laptop. Thus I changed it, and updated the package.
 Now I redo the tests on my office computer.

--
Ticket URL: <http://trac.sagemath.org/ticket/18514#comment:52>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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