TypeError thrown by cron background job

[BMerz]

Steps to reproduce

Open nextcloud log error message is shown

[mail] Fehler: TypeError: OCA\Mail\IMAP\MailboxStats::__construct(): Argument #1 ($total) must be of type int, null given, called in /var/www/nextcloud/apps/mail/lib/IMAP/FolderMapper.php on line 147 at <<closure>>

0. /var/www/nextcloud/apps/mail/lib/IMAP/FolderMapper.php line 147
   OCA\Mail\IMAP\MailboxStats->__construct()
1. /var/www/nextcloud/apps/mail/lib/IMAP/MailboxSync.php line 294
   OCA\Mail\IMAP\FolderMapper->getFoldersStatusAsObject()
2. /var/www/nextcloud/apps/mail/lib/IMAP/MailboxSync.php line 145
   OCA\Mail\IMAP\MailboxSync->syncMailboxStatus("*** sensitive parameters replaced ***")
3. /var/www/nextcloud/apps/mail/lib/BackgroundJob/SyncJob.php line 110
   OCA\Mail\IMAP\MailboxSync->sync("*** sensitive parameters replaced ***")
4. /var/www/nextcloud/lib/public/BackgroundJob/Job.php line 81
   OCA\Mail\BackgroundJob\SyncJob->run()
5. /var/www/nextcloud/lib/public/BackgroundJob/TimedJob.php line 103
   OCP\BackgroundJob\Job->start()
6. /var/www/nextcloud/lib/public/BackgroundJob/TimedJob.php line 93
   OCP\BackgroundJob\TimedJob->start()
7. /var/www/nextcloud/cron.php line 152
   OCP\BackgroundJob\TimedJob->execute()

at 2023-08-25T18:05:07+00:00

message is shown around 14 times per day

Expected behavior

no error message is shown or a hint why this error occurs

Actual behavior

error message is shown with unknown reason

Mail app version

3.3.1

Mailserver or service

imap on debian

Operating system

Raspbian bullseye 64bit (Linux 6.1.21-v8+ aarch64)

PHP engine version

PHP 8.1

Web server

Nginx

Database

MariaDB

Additional info

No response

[ChristophWurst]

Can confirm. @hamza221 could you have a look?

[BMerz]

@hamza221 : Any news on this? Still having the issue.

[BMerz]

Hi @ChristophWurst , hamza221 seems not to be active on this issue. Log entries still exist in the log.

[hamza221]

This Happens when https://github.com/nextcloud/mail/blob/9046906d779f82ec2218dc3935187d8430c6d194/lib/IMAP/FolderMapper.php#L146 Is not returned from the IMAP server, We can fix this by manually throwing an exception before instantiating MailboxStats to have better logs. what do you think @ChristophWurst ?

[ChristophWurst]

We should check if the IMAP RFC for the STATUS command dictates returning a value or if it's optional. If it should be there's we can think about throwing. Else we make our app handle null values.

[WeskerC]

same issue here. Wish the issue will be resolved soon. Thank you for your work @ChristophWurst ,greatly appreciated.

[WeskerC]

I copy the new php file and new bugs occur. @ChristophWurst Below are the log details. ’其他文件夹‘ means Other Folder.

[risto42]

Also bit by this.

[ChristophWurst]

@risto42 we are aware. Add your :+1: to https://github.com/nextcloud/mail/issues/8813#issue-1867586645. A comment is not necessary.