/usr/lib/debbugs/age-1 is in debbugs 2.4.1.1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | #!/bin/sh
# $Id: age-1.in,v 1.3 2002/01/06 10:46:24 ajt Exp $
set -e
cd /var/lib/debbugs/spool/db-h
test -f ./-3.log && rm ./-3.log
test -f ./-2.log && mv ./-2.log ./-3.log
test -f ./-1.log && mv ./-1.log ./-2.log
#rm -f ../stamp.html
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