bug: accessing a multikey may lead to IndexError (methods getOne() or get() )

[a-kleinf]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

(issue was observed with sdc11073 v1 but is also relevant for v2)

When accesing a multikey, at the same time as it is updated, an IndexError may occure.

File "....", line 349, in _check_alarm_activation_state
alert_state = self.mdib.states.descriptorHandle.getOne(alert_condition, allowNone=True)
File "...\lib\site-packages\sdc11073\multikey.py", line 52, in getOne
return result[0]
IndexError: list index out of range

in multikey.py
if a state update is triggered class MultiKeyLookup -> updateObject() is called and following code is executed:

with self._lock:
    self._rmIndices(obj)
    self._mkIndices(obj)

if getOne or get is called between self._rmIndices(obj) and self._mkIndices(obj) the IndexError may occure.
The instance of self._lock should be also used in getOne or get

Expected Behavior

Minimal Reproducible Example

No response

Solution proposal

No response

Python Version

3.10.11

Operating system

win32

Sdc11073 Version

1.3.0

Link to sdc11073 Logs

No response

Further Information

No response

Participation

• I am willing to submit a pull request to fix this bug.