This file is indexed.

/usr/lib/games/nethack/recover-helper is in nethack-common 3.6.0-4+b1.

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

cd /var/games/nethack || exit 1

for file in *.0; do
  # We only try to recover our own files, and ignore the others.
  if [ -f "$file" ] && [ ! -L "$file" ] && [ -O "$file" ]; then
    /usr/lib/games/nethack/recover "/var/games/nethack/$file"
  fi
done

exit 0