Keys with expiration date equals to zero ( TTL infinite) can not be restored

[billmetangmo]

================= How to reproduce ? ============

Prerequesite: A memcached up & running with 0 key

1. Save a TTL infinite data in memcached
   telnet localhost 11211
   set key1 0 0 9
   memcached

2. dump the content using memcached-util ( If you open the file generated, you will notice that this key is not present in JSON generated file)

3. Flush data in memcached
   telnet localhost 11211
   flush_all

4. Restore the content using memcahed-util

====================== Expected behaviour ==========
Data restored in memcached.

====================== What I got ================
Key key1 already expired, skipping

==================== Environment ==========

======= Operating system ====
Distributor ID: Ubuntu
Description: Ubuntu 18.04.1 LTS
Release: 18.04
Codename: bionic

======= Memcached version ====
1.5.12

==================== Possible workaround ===========
To restore with TTL infinite key do:

cat /tmp/memcached-backup | jq "map ( if .expiry then . + {expiry:$(date +%s -d "+1 days")} else . + {expiry:$(date +%s -d "+1 days")} end)" | jq -c "" >> /tmp/memcached-restore | memcached-util --op restore --filename /tmp/memcached-backup2

before restoring ( restore from memcached-backup2)

[meabed]

Thanks for reporting it :) i guess the 0 Comparison is the causing the issue, ill fix and add test and update the issue in a bit 👍

[billmetangmo]

Thanks @meabed . It will help me to not use my weird workaround :) .