[ icewm-Bugs-1573405 ] icewm segfault with qt-4.2 application

Bugs item #1573405, was opened at 2006-10-09 02:43
Message generated for change (Comment added) made by captnmark
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Category: icewm-1.2
Group: crash
Status: Open
>Resolution: Fixed
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
>Assigned to: Marko Macek (captnmark)
Summary: icewm segfault with qt-4.2 application

Initial Comment:
Hi 

Thanks for your work on icewm! I'm learning how to
program with Trolltech's Qt. Using the GPLed Qt 4.2.0
(http://www.trolltech.com/developer/downloads/qt/index),
running the simple program attached makes icewm segfault.

I compiled/linked it against Qt 4.2.0 using "qmake
-project && qmake && make".

Whenever I run it, the X server crashes with the message

/usr/X11R6/lib/X11/xinit/xinitrc: line 28: 12113
Segmentation fault      icewm

This is happening on

icewm 1.2.28 compiled with default compile and run-time
options
X.Org 6.9.0
Linux 2.4.31, glibc 2.3.5
g++ 3.3.6

Running gdb on this program only printed "program
exited normally"; icewm crashed immediately after that
message was shown. 

If I can provide more useful information let me know.

Best,

Juergen Lemke

----------------------------------------------------------------------

>Comment By: Marko Macek (captnmark)
Date: 2006-11-12 09:26

Message:
Logged In: YES 
user_id=1814

fixed in CVS

----------------------------------------------------------------------

Comment By: Eduard Bloch (thefirstone)
Date: 2006-10-20 22:40

Message:
Logged In: YES 
user_id=935104


The small attached change "fixes" the problem. However, the
code is undocumented and I have no clue why it is there.

Index: wmmgr.cc
===================================================================
RCS file: /cvsroot/icewm/icewm-1.2/src/wmmgr.cc,v
retrieving revision 1.104.2.30
diff -r1.104.2.30 wmmgr.cc
632c632
< #if 1
---
> #if 0


----------------------------------------------------------------------

Comment By: Eduard Bloch (thefirstone)
Date: 2006-10-20 22:25

Message:
Logged In: YES 
user_id=935104

I can reproduce it as well and also with the current
cdfly-0.3 application. Looking at the first gdb backtrace it
looks like a stack overflow. Icewm is looping between:

handleWindowEvent() (yxapp.cc:905)
handleEvent() (ywindow.cc:617)

The whole thing begins in handleXEvents(yxapp.cc:852)

I cannot tell more for now, I am confused because
handleEvent() (ywindow.cc:617) should run
handleUnmapNotify(event.xunmap); which has no way to call
handleEvent again, AFAICS.

----------------------------------------------------------------------

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