Error in forget / prune does not trigger failure hook

[MadWalnut]

Describe the bug
I have noticed that on one of my targets prunes have not been happening since a few weeks. Backups were working fine. After checking the logs, prune does indeed seem to fail with repo already locked, waiting up to 0s for the lock & exit status 11 & Error: 1 errors were found. However, this has not triggered my Healthchecks.io URL which I have configuried in the failure hook. Not sure if prune errors are excluded by design from the failure hook or if this actually is a bug?

Expected behavior
If the forget / prune fails after a successful backup, the failure hook should be executed, not the success hook.

Environment

• OS: Synology DSM 7
• Version: 1.8.2
• Install: Docker

Additional context

Log file:

Using config: 	 /config/.autorestic.yaml
Using env:	 /config/.autorestic.env
Using lock:	 /config/.autorestic.lock.yml
Backing up location "limited"
Running hooks
> curl -m 10 --retry 5 https://hc-ping.com/XXX/start
> Executing: /bin/bash -c curl -m 10 --retry 5 https://hc-ping.com/XXX/start
OK
Backend: target-limited
> Executing: /usr/bin/restic backup --limit-upload 3000 --exclude */#recycle --exclude */.Trash-1000 --exclude */Thumbs.db --exclude */@eaDir --tag ar:location:limited /mnt/source
using parent snapshot 12689a9a
"Files:         316 new,   919 changed, 744156 unmodified"
"Dirs:          140 new,   613 changed, 137152 unmodified"
Added to the repository: 2.600 GiB (2.317 GiB stored)
"processed 745391 files, 3.339 TiB in 21:24"
snapshot 530b2b2c saved
Running hooks
Running hooks
> curl -m 10 --retry 5 https://hc-ping.com/XXX/0
> Executing: /bin/bash -c curl -m 10 --retry 5 https://hc-ping.com/XXX/0
OK
Forgetting for location "limited"
For backend "target-limited"
> Executing: /usr/bin/restic forget --tag ar:location:limited --prune --limit-upload 3000 --keep-daily 7 --keep-monthly 3 --keep-weekly 4
"repo already locked, waiting up to 0s for the lock"
exit status 11
Backing up location "full"
Running hooks
> curl -m 10 --retry 5 https://hc-ping.com/YYY/start
> Executing: /bin/bash -c curl -m 10 --retry 5 https://hc-ping.com/YYY/start
OK
Backend: target-full
> Executing: /usr/bin/restic backup --limit-upload 3000 --exclude */#recycle --exclude */.Trash-1000 --exclude */Thumbs.db --exclude */@eaDir --tag ar:location:full /mnt/source /mnt/source-additional
using parent snapshot b3567c30
"Files:         383 new,   936 changed, 760519 unmodified"
"Dirs:          173 new,   665 changed, 137066 unmodified"
Added to the repository: 3.022 GiB (2.688 GiB stored)
"processed 761838 files, 3.593 TiB in 25:48"
snapshot 78c7d254 saved
Running hooks
Running hooks
> curl -m 10 --retry 5 https://hc-ping.com/YYY/0
> Executing: /bin/bash -c curl -m 10 --retry 5 https://hc-ping.com/YYY/0
OK
Forgetting for location "full"
For backend "target-full"
> Executing: /usr/bin/restic forget --tag ar:location:full --prune --limit-upload 3000 --keep-daily 7 --keep-yearly 4 --keep-monthly 12 --keep-weekly 4
"Applying Policy: keep 7 daily, 4 weekly, 12 monthly, 4 yearly snapshots"
keep 13 snapshots:
# removed for readability
weekly snapshot   /mnt/source-additional
monthly snapshot
yearly snapshot
----------------------------------------------------------------------------------------------------------------------------
13 snapshots
remove 1 snapshots:
ID        Time                 Host              Tags                    Paths
-----------------------------------------------------------------------------------------------
5ddf80d3  2024-07-30 00:05:03  autorestic-server  ar:location:full  /mnt/source
/mnt/source-additional
-----------------------------------------------------------------------------------------------
1 snapshots
[0:00] 100.00%  1 / 1 files deleted
"1 snapshots have been removed, running prune"
loading indexes...
loading all snapshots...
finding data that is still in use for 13 snapshots
[3:50] 100.00%  13 / 13 snapshots
searching used packs...
collecting packs for deletion and repacking
[5:33] 100.00%  281263 / 281263 packs processed
to repack:          2400 blobs / 29.088 MiB
this removes:        399 blobs / 2.327 MiB
to delete:             0 blobs / 0 B
total prune:         399 blobs / 2.327 MiB
remaining:       4732944 blobs / 4.554 TiB
unused size after prune: 233.094 GiB (5.00% of remaining size)
repacking packs
[0:17] 100.00%  3 / 3 packs repacked
rebuilding index
[0:08] 100.00%  36 / 36 indexes processed
[0:00] 100.00%  6 / 6 old indexes deleted
removing 3 old packs
[0:00] 100.00%  3 / 3 files deleted
done
Done
Done
Error: 1 errors were found

Config file:

version: 2

locations:
  limited:
    from: /mnt/source
    to: target-limited
    forget: prune
    options:
      backup:
        exclude:
          - '*/#recycle'
          - '*/.Trash-1000'
          - '*/Thumbs.db'
          - '*/@eaDir'
      forget:
        keep-daily: 7
        keep-weekly: 4
        keep-monthly: 3
      all:
        limit-upload: 3000
    hooks:
      before:
        - curl -m 10 --retry 5 https://hc-ping.com/XXX/start
      failure:
        - curl -m 10 --retry 5 https://hc-ping.com/XXX/1
      success:
        - curl -m 10 --retry 5 https://hc-ping.com/XXX/0
  full:
    from:
      - /mnt/source
      - /mnt/source-additional
    to: target-full
    forget: prune
    options:
      backup:
        exclude:
          - '*/#recycle'
          - '*/.Trash-1000'
          - '*/Thumbs.db'
          - '*/@eaDir'
      forget:
        keep-daily: 7
        keep-weekly: 4
        keep-monthly: 12
        keep-yearly: 4
      all:
        limit-upload: 3000
    hooks:
      before:
        - curl -m 10 --retry 5 https://hc-ping.com/YYY/start
      failure:
        - curl -m 10 --retry 5 https://hc-ping.com/YYY/1
      success:
        - curl -m 10 --retry 5 https://hc-ping.com/YYY/0

backends:
  target-limited:
    type: sftp
    path: 192.168.1.100:/path
  target-full:
    type: sftp
    path: 192.168.1.101:/path