This bug was fixed in the package debhelper - 9.20160115ubuntu3
--------------- debhelper (9.20160115ubuntu3) xenial; urgency=medium
* Backport upstream commit 9ca73a0a ("Pass -a to grep to handle substvars with unicode content gracefully") to fix build-failure with php-mf2 (LP: #1564492, Closes #815620).
-- Nishanth Aravamudan <email address hidden> Thu, 31 Mar 2016 08:33:23 -0700
This bug was fixed in the package debhelper - 9.20160115ubuntu3
---------------
debhelper (9.20160115ubuntu3) xenial; urgency=medium
* Backport upstream commit 9ca73a0a ("Pass -a to grep to handle
substvars with unicode content gracefully") to fix build-failure
with php-mf2 (LP: #1564492, Closes #815620).
-- Nishanth Aravamudan <email address hidden> Thu, 31 Mar 2016 08:33:23 -0700