This also happened when my cronjob to update my schroots ran e.g.:
for d in $(schroot -l | grep -- '^source:') do echo $d schroot -q -c $d -u root --directory / -- sh -c 'apt-get -qq update && apt-get -y dist-upgrade && apt-get clean' #schroot -c $d -u root -- sh -c \ done
This also happened when my cronjob to update my schroots ran e.g.:
for d in $(schroot -l | grep -- '^source:')
do
echo $d
schroot -q -c $d -u root --directory / -- sh -c 'apt-get -qq update && apt-get -y dist-upgrade && apt-get clean'
#schroot -c $d -u root -- sh -c \
done