This file is indexed.

/usr/lib/cruft/explain/lightdm is in cruft-common 0.9.34.

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

for user in root $(awk -F: '{ if ( 1000 <= $3 && $3 < 30000 ) print $1 }' /etc/passwd)
do
	if [ -d "/var/lib/lightdm/data/$user" ]
	then
		echo "/var/lib/lightdm/data/$user"
	fi
done