+ echo ' -> unmounting proc filesystem'
 -> unmounting proc filesystem
+ local UMOUNT_OUTPUT
++ LC_ALL=C
++ umount /var/cache/pbuilder/build//9871/proc
+ UMOUNT_OUTPUT=
+ cleanbuildplace
+ '[' 0 -ne 0 ']'
+ '[' '' '!=' yes ']'
+ '[' -d /var/cache/pbuilder/build//9871 ']'
+ echo ' -> cleaning the build env '
 -> cleaning the build env 
+ clean_subdirectories /var/cache/pbuilder/build//9871
+ '[' -z /var/cache/pbuilder/build//9871 ']'
+ '[' '!' -d /var/cache/pbuilder/build//9871 ']'
+ echo '    -> removing directory /var/cache/pbuilder/build//9871 and its subdirectories'
    -> removing directory /var/cache/pbuilder/build//9871 and its subdirectories
+ find /var/cache/pbuilder/build//9871 -xdev '(' '!' -type d ')' -print0
+ xargs -0 rm -f
+ find /var/cache/pbuilder/build//9871 -xdev -depth -type d -print0
+ xargs -0 rmdir
+ trap - exit sighup
+ exit 1