[Octave-bug-tracker] [bug #57737] [octave forge] (symbolic) Test failure with sympy 1.5.1

[Mike Miller]

Update of bug #57737 (project octave):

              Item Group:           Build Failure => Incorrect Result       
                  Status:                    None => Confirmed              
                 Release:                   5.1.0 => dev                    

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Follow-up Comment #1:

Confirmed. This is a little strange. With both SymPy 1.4 and 1.5, the Octave
call `finiteset()` calls the SymPy function `FiniteSet()`, which returns an
`EmptySet` object.

However, in 1.5, when the `EmptySet` object is passed in as an argument to the
'plus' operation, it's interpreted differently as a 'Singleton' object.

In both 1.4 and 1.5, `EmptySet + FiniteSet(1)` does the right thing, but in
1.5, the Python-to-Octave-to-Python conversion of EmptySet messes something
up.

Cc @cbm.

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