YaST lan module: Client call failed with 'Augeas parsing/serializing error: Iterated lens matched less than it should.

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Environment

SUSE Linux Enterprise Server 12 Service Pack 3 (SLES 12 SP3)

Situation

Running 'yast lan' module fails with a popup message to report a bug.

Within /var/log/YaST/y2log a detailed error message shows :

Relevant snippet from the log file :
...
Details: Augeas parsing/serializing error: Iterated lens matched less than it should at /usr/share/augeas/lenses/dist/hosts.aug:23.12-.42:

...

Resolution

Add a line break at the end of /etc/hosts as below :

echo >> /etc/hosts

Cause

The last line in /etc/hosts does not have line termination "\n".

This can be verified by doing e.g. 'cat /etc/hosts', and not seeing the bash prompt on a new line as a result.

Additional Information

Disclaimer

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