Re: Found possible commit that causes ... (Was: Re: Re: FYI [Bug 289693] Kmail crash on exit)

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On 01/04/2012 06:51 AM, Martin Kho wrote:
On Tue, 2012-01-03 at 22:57 +0000, Colin J Thomson wrote:
On Tuesday 03 Jan 2012 17:12:54 Martin Kho wrote:
On Sunday 01 January 2012 18:14:15 Colin J Thomson wrote:
On Sunday 01 Jan 2012 11:54:55 Rex Dieter wrote:
Colin J Thomson wrote:
On Sunday 01 Jan 2012 00:02:57 Colin J Thomson wrote:
On Sunday 01 Jan 2012 00:39:12 Kevin Kofler wrote:
Colin J Thomson wrote:
And Kmail2 still crashes, however in #289693 it is marked as
fixed
in
4.8

I already reopened the bug. All the fixes so far don't work.

If another backtrace is needed after the updates applied on this box
let
me know.

I have just found another report + fix possibly related to #289693

https://bugs.kde.org/show_bug.cgi?id=289831

That's the patch we applied to kdepimlibs-4.7.95-2 , doesn't seem to
help
any (for me).

I was not sure if it was the same patch, fyi it does not help here either.

It's fairly obvious by now the qList is getting corrupted somehow, so
efforts to change how it's items are free'd essentially don't help much
at
this point.

OK, I'll keep an eye on kde.bugs, maybe a comment and new back trace could
be added to #289831 (which is marked as fixed) saying that the crash still
happens.

Today for me too, Kmail2 crashed as described above. The crash happened
after I had removed some email messages. Kmail2 got really lost. Header
info and message bodies were mixed up, sometimes kmail2 hung up or crashed.
So I think the problem - as Kevin already said - is not in the destroy
methode (c.q. qDeleteAll), but is somewhere in the manipulating
(creation/removing) methodes of the qList.

One thing I have been trying to avoid the crash is closing Kontact is via the
system activity and ending the process, not ideal but seems to work.

Colin

Hi,

May be commit [1] causes the crashes in kdepimlibs-4.7.95-1(2). The next
commit [2] reverts commit 1, but isn't in 4.7.95-1(2). Allen Winter says
about these commits:

"Revert "Add a bunch of validity checks to avoid crashes."

This reverts commit baa76292fbbe4918a630203269e0822905db3503.

I think I might have broken some things with this commit
so I'm reverting it so I can test further."

Martin Kho


[1]
https://projects.kde.org/projects/kde/kdepimlibs/repository/revisions/baa76292fbbe4918a630203269e0822905db3503

[2]
https://projects.kde.org/projects/kde/kdepimlibs/repository/revisions/38f941b21e923a33a9756d030a42dc3ecb9e10f1

rc2, aka 4.7.97 is being packaged/built as I type this, so... we'll see. :)

-- rex
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