Add the ability to get the errorCode when a process ends with an Error

If I have this error definition:

<bpmn2:error id="error" errorCode="error"/>

And the process ends with that End event:

<bpmn2:endEvent id="EndEvent_4" name="End">
<bpmn2:incoming>SequenceFlow_4</bpmn2:incoming>
<bpmn2:errorEventDefinition id="ErrorEventDefinition_1" errorRef="error"/>
</bpmn2:endEvent>

...the process status is aborted (this is correct). What I expect is to get the "errorCode" in some way from the (aborted) process instance.