Bug 198930 - Xnest segfaults
Xnest segfaults
Status: CLOSED RAWHIDE
Product: Fedora
Classification: Fedora
Component: xorg-x11-server (Show other bugs)
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medium Severity medium
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Assigned To: X/OpenGL Maintenance List
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Depends On:
Blocks: FC6Target
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Reported: 2006-07-14 15:45 EDT by Tom London
Modified: 2007-11-30 17:11 EST (History)
0 users

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Environment:
Last Closed: 2006-07-26 20:23:52 EDT
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RHEL 7.3 requirements from Atomic Host:


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Tracker ID Priority Status Summary Last Updated
FreeDesktop.org 1117 None None None Never

  None (edit)
Description Tom London 2006-07-14 15:45:59 EDT
Description of problem:
Running 'Xnest -ac -noreset :5' under gnome/gdm segfaults.

Here is the output from 'gdb Xnest':
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1208854112 (LWP 4287)]
0x082bd00b in PictureDestroyWindow ()
(gdb) where
#0  0x082bd00b in PictureDestroyWindow ()
#1  0x082cdee4 in SDamageNotifyEvent ()
#2  0x082cd4c5 in SDamageNotifyEvent ()
#3  0x082c8a36 in SDamageNotifyEvent ()
#4  0x080853fa in NotImplemented ()
#5  0x0012a214 in __libc_start_main () from /lib/libc.so.6
#6  0x0805d3a1 in ?? ()
(gdb) 


Version-Release number of selected component (if applicable):
xorg-x11-server-Xnest-1.1.1-5.fc6


How reproducible:
Every time

Steps to Reproduce:
1. install Xnest
2. 'Xnest -ac -noreset :5'
3.
  
Actual results:


Expected results:


Additional info:
Comment 1 Adam Jackson 2006-07-15 22:22:32 EDT
This appears to be a side effect of switching on Composite by default; since
Xnest lacks Render support, and Composite requires it, things blow up quite nicely.

I have a partial fix based on what I proposed in upstream Xorg bugzilla, but it
doesn't work quite right yet.
Comment 2 Tom London 2006-07-19 17:11:08 EDT
Still segfaults with xorg-x11-server-Xnest-1.1.1-6.fc6
Comment 3 Tom London 2006-07-24 09:48:15 EDT
Still segfaults with xorg-x11-server-Xnest-1.1.1-8.fc6
Comment 4 Adam Jackson 2006-07-26 20:23:42 EDT
Should be fixed now in xorg-x11-server-Xnest 1.1.1-11.fc6 or later.
Comment 5 Adam Jackson 2006-07-26 20:23:52 EDT
Should be fixed now in xorg-x11-server-Xnest 1.1.1-11.fc6 or later.

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