Configparser Plugin: AttributeError: NoneType object has no attribute append

[simisimon]

The analysis of linux failed.

2022-01-08 00:31:23,055 |    ERROR |             analyzer | An exception occurred during analysis at commit f940260a980a1ad7570dfd7a4b73c6ad2207f738.
2022-01-08 00:31:23,056 |    ERROR |             analyzer | 'NoneType' object has no attribute 'append'

Traceback:

...
  File "/tmp/ssimon/analysis/8/venv/lib/python3.10/site-packages/cfgnet/network/network.py", line 285, in init_network
    plugin.parse_file(
  File "/tmp/ssimon/analysis/8/venv/lib/python3.10/site-packages/cfgnet/plugins/plugin.py", line 81, in parse_file
    artifact = self._parse_config_file(
  File "/tmp/ssimon/analysis/8/venv/lib/python3.10/site-packages/cfgnet/plugins/file_type/configparser_plugin.py", line 41, in _parse_config_file
    config.read_string(dummy_section + file_content)
  File "/usr/local/lib/python3.10/configparser.py", line 724, in read_string
    self.read_file(sfile, source)
  File "/usr/local/lib/python3.10/configparser.py", line 719, in read_file
    self._read(f, source)
  File "/usr/local/lib/python3.10/configparser.py", line 1061, in _read
    cursect[optname].append(value)
AttributeError: 'NoneType' object has no attribute 'append'

[simisimon]

It seems that this problem occurs in the configparser library and not in our own implementation. Unfortunately, we do not know which file is responsible for the error, and checking the corresponding commit does not help either.