symbolic package fail (Octave 5.2.0/Symbolic 2.9.0)

[przemek klosowski]

octave-5.2.0-12.fc34.x86_64
octave-symbolic-2.9.0-5.fc34.noarch

doesn't work:

pkg load symbolic

syms xx

Symbolic pkg v2.9.0: Traceback (most recent call last):
  File "<stdin>", line 28, in <module>
AttributeError: '_PrintFunction' object has no attribute '__globals__'
Closing the Python communications link.

error: Python exception: AttributeError: '_PrintFunction' object has no 
attribute '__globals__'
    occurred in python_header import block.
    Try "sympref reset" and repeat your command?
    (consider filing an issue at https://github.com/cbm755/octsympy/issues)
error: called from
    pycall_sympy__ at line 191 column 5
    valid_sym_assumptions at line 38 column 10
    assumptions at line 82 column 7
    syms at line 97 column 13


It's probably some Python 3 integration problem; before I open a 
Bugzilla issue for it I thought I'd ask here.