Bug 483686

Summary:	Cannot reply to messages in any mailbox for a large account
Product:	[Applications] kmail2	Reporter:	luna <luna>
Component:	message list	Assignee:	kdepim bugs <kdepim-bugs>
Status:	RESOLVED DUPLICATE
Severity:	major	CC:	nicolas.fella, shivarryn
Priority:	NOR	Keywords:	qt6
Version:	6.0.0
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description luna 2024-03-15 15:34:11 UTC

SUMMARY

I have a mailbox with ~90k messages that, while rather slow, still worked under Plasma 5. Since upgrading to Plasma 6, when I try to reply to a message for that account (in *any* mailbox, not just the large one), kmail uses 100% CPU and seems to consume all memory on the system--when I last observed this, I let it go to 25 GB RES before closing it. I did not have this problem with Plasma 5.

STEPS TO REPRODUCE
1. Have or create a large mailbox, maybe 50k messages will suffice
2. Try to reply to a message in the account, in any mailbox, using either menu button or keybinding
3. Observe the application become unresponsive, using 100% CPU and eventually 100% memory

OBSERVED RESULT
Kmail uses all CPU and memory

EXPECTED RESULT
The compose window opens for the message reply

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux updated as of this morning
(available in About System)
KDE Plasma Version: 6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2

Comment 1 shivarryn 2024-03-18 07:37:35 UTC

seems bug 482367

Comment 2 luna 2024-03-18 12:27:36 UTC

(In reply to shivarryn from comment #1)
> seems bug 482367

Yeah, you're right. This is definitely a dupe. Sorry for the noise, bugzilla's search is not great. :(

*** This bug has been marked as a duplicate of bug 482367 ***