https://bugs.kde.org/show_bug.cgi?id=408176

            Bug ID: 408176
           Summary: Alternative initialisation? Sagemath (= 8.6-6) on
                    python 2 (unicode issue?) crashes on: exec
                    sage-ipython -i --simple-prompt
           Product: cantor
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: sage-backend
          Assignee: cantor-b...@kde.org
          Reporter: d...@bk.ru
  Target Milestone: ---

SUMMARY
master-branch Cantor v19.07.70+git20190523

STEPS TO REPRODUCE
1. Notice in src/backends/sage/cantor-execsage, line 15:
exec sage-ipython -i --simple-prompt
2. Try Cantor with Sagemath (= 8.6-6) on python 2 (unicode issue?), available
in Ubuntu repos, or, indeed, try the above command

OBSERVED RESULT
Sagemath (rendering Cantor unusable) crashes with a distinctive error message

EXPECTED RESULT
Initialisation of the sage-backend

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Ubuntu 18.04.2
(available in About System)
KDE Plasma Version: N/A (irrelevant, but) (Unity)
KDE Frameworks Version:  (irrelevant, but) any from v5.44.0 backported to, to
v5.58.0 (backported)
Qt Version:  (less relevant, but) v5.9.5 backported to, or any released up to
date

ADDITIONAL INFORMATION
Are there any alternative ways of initialising the backend?
Cantor lovely works well with the rest of unproblematic backends, except the
julia-backend, which is the subject of another bugreport

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