Bug 341746

Summary:	Deleting a search folder puts kontact/kmail2 in dire state and finally crashes the Application
Product:	[Applications] kmail2	Reporter:	Rigo Wenning <rigo>
Component:	search	Assignee:	kdepim bugs <kdepim-bugs>
Status:	RESOLVED DUPLICATE
Severity:	crash	CC:	chrigi_1, faure, montel
Priority:	NOR
Version:	Git (master)
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed In:

Description Rigo Wenning 2014-12-10 15:44:38 UTC

Deleting virtual folders makes the imap- folder list disappear for at least 5 minutes without optical feedback that kmail2 is working. Once the folder list comes back, kmail2 is in a dire state and will ultimately crash with 100% on one of the cores. 

Reproducible: Always

Steps to Reproduce:
To reproduce: 
1. Start a search in your imap - account in some folder (or all). 
2. Accept to create a virtual folder (last-search). 
3. Search (completes without problems)
4. After the search, look at some messages. 
5. Then delete this virtual folder (last search)

Actual Results:  
Now the imap - account disappears from the folder-list (left) and eventually re-appears after 5-6 minutes (seems to depend on how large the imap account is). No feedback on processing is given. Now kmail2 is in a dire state. Some new arbitrary folder appears in the favorites. After some time, kmail2 starts using 100% of one core. 

Expected Results:  
The virtual folder is deleted without re-processing everything and kmail remains in a stable state. 

Luc Montel confirmed the behaviour and said it has to do with the ETM

Comment 1 Laurent Montel 2014-12-10 15:47:09 UTC

It's an ETM bug.
Christian knows this class.

Comment 2 David Faure 2016-07-12 07:55:48 UTC

Turned out to be a KRecursiveFilterProxyModel bug, actually.
Fix coming up.

*** This bug has been marked as a duplicate of bug 349789 ***