This bug was fixed in the package os-prober - 1.70ubuntu3
--------------- os-prober (1.70ubuntu3) xenial; urgency=low
* Check for MSDOS extended partitions and skip any further tests which would require the partition to be mounted (LP: #1374759).
-- Stefan Bader <email address hidden> Tue, 08 Mar 2016 09:35:20 +0100
This bug was fixed in the package os-prober - 1.70ubuntu3
---------------
os-prober (1.70ubuntu3) xenial; urgency=low
* Check for MSDOS extended partitions and skip any further tests which
would require the partition to be mounted (LP: #1374759).
-- Stefan Bader <email address hidden> Tue, 08 Mar 2016 09:35:20 +0100