This file is indexed.

/etc/piuparts/scripts/post_distupgrade_exceptions is in piuparts 0.56ubuntu1.

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

log_debug() {
	echo "Debug: piuparts exception for package $PIUPARTS_OBJECTS"
}

if	[ "$PIUPARTS_DISTRIBUTION" = "wheezy" ] || \
	[ "$PIUPARTS_DISTRIBUTION" = "wheezy-proposed" ] ; then

	# libdb4.8/squeeze is part of the minimal squeeze chroot and
	# remains installed after distupgrade even if it no longer
	# exists in wheezy
	# db4.8-util/wheezy Conflicts/Replaces libdb4.8, so ensure it
	# gets removed from the reference chroot, too
	case ${PIUPARTS_OBJECTS%%=*} in
		db4.8-util|cyrus-*-2.2|libcyrus-imap-perl22|sa-learn-cyrus)
			log_debug
			dpkg --purge libdb4.8
			;;
	esac

fi