This file is indexed.

/etc/piuparts/scripts-wheezy/post_setup_wheezy-fake-essential is in piuparts 0.77.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/bin/sh
set -e

# The following issues won't be fixed in wheezy:
#   - unconditional use of deluser during postrm purge
#   - unconditional use of ucf during postrm purge
# so add these packages to the "fake" essential set.
USED_DURING_PURGE="adduser ucf"


case ${PIUPARTS_OBJECTS%%=*} in
	dpkg)
		# don't install fake essential packages while creating the tarball
		exit 0
		;;
	adduser|ucf)
		# allow testing of the fake essential packages
		exit 0
		;;
esac

echo "*** Adding fake essential packages ***"
apt-get install -yf $USED_DURING_PURGE