Bug 823499

*** Bug 823518 has been marked as a duplicate of this bug. ***

(In reply to comment #0)
> #0  0x28561c54 in free () from /lib/libc.so.7
> #1  0x281b745c in XFreeStringList () from /usr/local/lib/libX11.so.6
> #2  0x080ee215 in FlocaleFreeNameProperty (ptext=0x289b3008) at
> Flocale.c:2358
> #3  0x08095e42 in free_window_names (fw=0x289b3000, nukename=0, nukeicon=1)
> at add_window.c:3171

Can you send through your fvwm2rc file, please?

> Problem does not occur with 2.5.30 (Fedora rpm) and does not seem to occur

That version is unsupported.

> with 2.6.3 (built from sources) but does occur with 2.6.4 and 2.6.5.
> 
> Between 2.6.3 and 2.6.4 there was a change to fvwm/events.c:3386:
>                if (!WAS_ICON_NAME_PROVIDED(fw))
> became:
>                if (!WAS_ICON_NAME_PROVIDED(fw) || (fw->icon_name.name &&
>                        (fw->icon_name.name != fw->name.name)))

That's because I made this change for 2.6.3.

> Backing out this change seems to fix the problem (see attached patch). I
> note that 2.7.0 reverts to the 2.6.3 without the OR condition, so I suspect
> someone has already noticed this bug, which, as far as I can tell, is only
> present in 2.6.4 and 2.6.5.

No -- backing out this change is not a solution.  Note that I cannot reproduce your problem at all, so I'm interested in knowing about your fvwm2rc file.  Can you also tell me whether this is 64bit?

Why are you looking at 2.7.0?  That version of FVWM is not supported, never has been, and was deprecated by me (and even announced as such) months ago.  This means your assertion above is completely incorrect.  Please don't mislead people in thinking anything else.

See:  http://www.mail-archive.com/fvwm-workers@fvwm.org/msg02572.html

Today I have been bitten by a similar problem, that may have the same cause. I upgraded to the latest available Fedora 16 packages. Strange enough nothing changed for fvwm which remained at fvwm 2.6.5-1.fc16

Following this update I found that in certain conditions the whole window manager crashes and dumps you back to the gdm login. This especially occurs in thunderbird while changing from one tab to another, and also sometimes in firefox. This for example made it impossible to start and use the lightning plugin.

After finding the information in this bug report I tried to manually compile fvwm version 2.6.3 in my user account (I have no root permission at my machine at work).
Switching to this fvwm version seemed impossible at first, untill I found the package xorg-x11-xinit-session needs to be installed first. Our system administrator was kind enough to quickly do this for me, and switching to version 2.6.3 clearly solved the problem for me.

If you need any additional info please let me know.

I forgot to mention that I see this line in my .xsession-errors file after the crash has happened:

fvwm: xcb_io.c:128: append_pending_request: Assertion `(((long) (dpy->xcb->pendi
ng_requests_tail->sequence) - (long) (node->sequence)) < 0)' failed.
Abort (core dumped)

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Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is 
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problem is still present in Fedora18. See bug #967548. I'll attach my config file there so you can inspect it.

*** Bug 967548 has been marked as a duplicate of this bug. ***

I suppose this bug is in fvwm itself. See here: https://bugs.launchpad.net/ubuntu/+source/fvwm/+bug/1225839

I have been using cvs version of fvwm for a week now (self-compiled) and the problem hasn't repeated itself. I am not good with cvs so couldn't find the exact date when it was fixed.

Yes, it seems dje has essentially done the same thing I did, back in Movember:) He change the lines

               if (!WAS_ICON_NAME_PROVIDED(fw) || (fw->icon_name.name &&
                       (fw->icon_name.name != fw->name.name)))

to be

                if (!WAS_ICON_NAME_PROVIDED(fw)
#if 0
                    /* dje, reported as causing various dumps.
                       I tried to debug, but so far haven't even figured out
                       how to exercise this logic. Mov 9, 2013. */
                    || (fw->icon_name.name &&
                        (fw->icon_name.name != fw->name.name))
#endif
)

I've been using fvwm continuously with the bit after the "||" removed, for nearly two years now, reapplying the patch after each upgrade of Fedora (I'm on Fedora 20 now), and it works fine. After each upgrade, I've tried the unpatched version until it crashed. That typically took less than an hour. Then I switched to the patched version and have had no problems with it.

This bug appears to have been reported against 'rawhide' during the Fedora 23 development cycle.
Changing version to '23'.

(As we did not run this process for some time, it could affect also pre-Fedora 23 development
cycle bugs. We are very sorry. It will help us with cleanup during Fedora 23 End Of Life. Thank you.)

More information and reason for this action is here:
https://fedoraproject.org/wiki/BugZappers/HouseKeeping/Fedora23

The problem still occurs with the Fedora 23 version. Another way to trigger it, which seems to be quite reproducible is to open an image in gimp and then close gimp.

After applying dje's changes (see previous comment) I have been unable to trigger it.

This bug is rapidly approaching its fourth birthday, yet it is still marked as "new"!

fvwm-2.6.5-12.fc23 has been submitted as an update to Fedora 23. https://bodhi.fedoraproject.org/updates/FEDORA-2016-0e095aba1f

Sorry for the delay - I'm no longer using fvwm actively. Please try this build.

fvwm-2.6.5-12.fc23 has been pushed to the Fedora 23 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-0e095aba1f

This looks good. I installed fvwm-2.6.5-12.fc23.x86_64 on Friday and so far no crashes.

fvwm-2.6.5-12.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.