This bug was fixed in the package dpkg - 1.17.5ubuntu5.6
--------------- dpkg (1.17.5ubuntu5.6) trusty; urgency=medium
* dpkg-maintscript-helper: s/exit/return/ in subshells (LP: #1574285)
-- Adam Conrad <email address hidden> Mon, 25 Apr 2016 12:44:01 -0600
This bug was fixed in the package dpkg - 1.17.5ubuntu5.6
---------------
dpkg (1.17.5ubuntu5.6) trusty; urgency=medium
* dpkg-maintscrip t-helper: s/exit/return/ in subshells (LP: #1574285)
-- Adam Conrad <email address hidden> Mon, 25 Apr 2016 12:44:01 -0600