This bug was fixed in the package grub2-signed - 1.34.5
--------------- grub2-signed (1.34.5) trusty; urgency=medium
* Rebuild against grub-efi-amd64 2.02~beta2-9ubuntu1.4 (LP: #1311247)
-- Adam Conrad <email address hidden> Mon, 05 Oct 2015 04:23:21 -0600
This bug was fixed in the package grub2-signed - 1.34.5
---------------
grub2-signed (1.34.5) trusty; urgency=medium
* Rebuild against grub-efi-amd64 2.02~beta2- 9ubuntu1. 4 (LP: #1311247)
-- Adam Conrad <email address hidden> Mon, 05 Oct 2015 04:23:21 -0600