When I try to create a program graph, I encounter a KeyError. If I remove all the and and or expressions from the python file (buggy.py) the error does not occur.

This is how I use the library:

graph = program_graph.get_program_graph(code)
program_graph_graphviz.render(graph, path='source.png')

where code is simply the code in the attached file buggy.py.txt.

I have also attached the log file log.txt.

buggy.py.txt

log.txt

More information:
python 3.9.5
commit head=44c15b92197f374c3550353ff827997ef1c1d857
gast 0.5.3