python-duckdb stuck in its tests

[Andreas Enge]

Hello the Python team,

python-duckdb sticks out on the build farm, since it apparently gets blocked
in its tests after spending quite some CPU time for building, and finally
it times out after a day. It seems to happen consistently over several
evaluations. The last lines are:
tests/fast/test_multithread.py::TestDuckMultithread::test_transaction[pandas0] 
PASSED [  8%]
tests/fast/test_multithread.py::TestDuckMultithread::test_transaction[pandas1] 
PASSED [  8%]
tests/fast/test_multithread.py::TestDuckMultithread::test_df_append[pandas0] 
PASSED [  8%]
tests/fast/test_multithread.py::TestDuckMultithread::test_df_append[pandas1] 

(see 
https://bordeaux.guix.gnu.org/build/56359106-e402-49d2-8c6b-2f35de90b7da/log)

Could you maybe have a look?

Andreas