LP:459195 - deb package fails with dpkg-buildpackage: warning: Failed to sign .dsc and .changes file

Trying to build a deb package fails with a warning and gives a return code != 0. This makes automating the packaging difficult.

How to repeat:
cd $PACKAGING_WORK
bakery/preheat.sh
cd bakery_

{number}
bakery/tarbake51.sh last:1 $MARIA_WORK
bakery/autobake-deb.sh mariadb-{version_num}-maria-beta-ourdelta{number}

.tar.gz
...
...
...
dpkg-genchanges >../mariadb-5.1_5.1.38-ourdelta83_amd64.changes
dpkg-genchanges: including full source code in upload
dpkg-buildpackage: full upload; Debian-native package (full source is included)
dpkg-buildpackage: warning: Failed to sign .dsc and .changes file

real 15m56.539s
user 12m17.670s
sys 2m1.516s

hakan@lu0012:~/work/monty_program/ourdelta-mariadb51-2/bakery-83$ echo $?
1

Details about the build procedure can be found here:
http://askmonty.org/wiki/index.php/BuildingMariaDB#Ubuntu_.deb_packages

Suggested fix:
hakan@lu0012:~/work/monty_program/ourdelta-mariadb51-2/bakery-83$ bzr diff
=== modified file 'bakery/autobake-deb.sh'
— bakery/autobake-deb.sh 2009-10-18 09:07:53 +0000
+++ bakery/autobake-deb.sh 2009-10-23 15:12:47 +0000
@@ -139,7 +139,9 @@

1. Build the package.
   #
   -fakeroot dpkg-buildpackage
   +# -us Do not sign the source package.
   +# -uc Do not sign the .changes file.
   +fakeroot dpkg-buildpackage -us -uc

1. Check if the local mirror deb-pool exists and move the results there.
2. we have ourdelta, ourdelta-sail, and mariadb-ourdelta