Setting up shim-signed (1.17~14.04.1+0.8-0ubuntu2) ...
Installing for x86_64-efi platform.
Installation finished. No error reported.
Use of uninitialized value $_[1] in join or string at /usr/share/perl5/Debconf/DbDriver/Stack.pm line 111, <GEN0> line 12.
Use of uninitialized value $val in substitution (s///) at /usr/share/perl5/Debconf/Format/822.pm line 83, <GEN2> line 8.
Use of uninitialized value $val in concatenation (.) or string at /usr/share/perl5/Debconf/Format/822.pm line 84, <GEN2> line 8.
Processing triggers for libc-bin (2.19-0ubuntu6.9) ...
Log ended: 2016-07-15 19:57:06
From the log file:
Setting up shim-signed (1.17~14. 04.1+0. 8-0ubuntu2) ... perl5/Debconf/ DbDriver/ Stack.pm line 111, <GEN0> line 12. perl5/Debconf/ Format/ 822.pm line 83, <GEN2> line 8. perl5/Debconf/ Format/ 822.pm line 84, <GEN2> line 8.
Installing for x86_64-efi platform.
Installation finished. No error reported.
Use of uninitialized value $_[1] in join or string at /usr/share/
Use of uninitialized value $val in substitution (s///) at /usr/share/
Use of uninitialized value $val in concatenation (.) or string at /usr/share/
Processing triggers for libc-bin (2.19-0ubuntu6.9) ...
Log ended: 2016-07-15 19:57:06
This does confirm some sort of debconf error.