NullPointerException when reading Devices / DeviceHierachies

[danielburkhart-itk]

I have seen some data cards crashing on import with a NullPointerException when reading Devices. A minimal example producing this exception is

<DVC A="DVC2" B="" C="" D="" E="" F="" G="">
	<DET A="DET2" B="1" C="1" D="" E="0" F="1"/>
</DVC>
<DVC A="DVC1" B="" C="" D="" E="" F="" G="">
	<DET A="DET1" B="1" C="1" D="" E="0" F="1"/>
</DVC>	

I understand that this example crashes, because the DET elements reference themselves. However, shouldn't the plugin skip such elements and be able to process the rest of the file?

The following example does not crash, although DET1 still references itself. Does someone understand this behavior?

<DVC A="DVC2" B="" C="" D="" E="" F="" G="">
	<DET A="DET2" B="1" C="1" D="" E="0" F="0"/>
</DVC>
<DVC A="DVC1" B="" C="" D="" E="" F="" G="">
	<DET A="DET1" B="1" C="1" D="" E="0" F="1"/>
</DVC>