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Bug#: 174345
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Status: RESOLVED
Resolution: NEEDINFO
Assigned To: Gentoo X packagers <x11@gentoo.org>
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Reporter: ville <vzheiska@cs.helsinki.fi>
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Bug 174345 depends on: Show dependency tree
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Bug 174345 blocks: 174434
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Description:   Opened: 2007-04-12 21:52 0000 
ville@kepakko ~ $ blender 
64 bits compiles will give incorrectly saved .blend files. Do not use it.

*** If you continue to run this executable, you really are quite stupid ***

guessing 'blender' == '/usr/bin/blender'
Compiled with Python version 2.4.
Checking for installed Python... got it!
blender: xcb_xlib.c:41: xcb_xlib_lock: Assertion `!c->xlib.lock' failed.
Aborted


Reproducible: Always

Steps to Reproduce:
1. emerge blender
2. run
3. witness the error

------- Comment #1 From Luca Barbato 2007-04-13 05:24:09 0000 ------- 
xcb is known to cause issues. Report upstream...

------- Comment #2 From Peter Weller 2007-04-13 06:04:55 0000 ------- 
Keyworded media-gfx/blender-2.43 ~amd64.

Other versions of blender have also been keyworded due to security bugs.

Due to the fact that blender creates incorrect .blend files on amd64, we will
not be marking it stable anytime soon. Removing amd64@gentoo.org for that
reason - feel free to readd us if you think you need to.

------- Comment #3 From ville 2007-04-13 10:14:02 0000 ------- 
kepakko ~ # USE="-xcb" emerge -va libX11

"Fixes" it so blender at least runs. Good enough for the time being.


// ville

------- Comment #4 From Attila Tóth 2007-04-15 23:41:39 0000 ------- 
I've also run into this problem, while upgrading to libX11-1.1.1-r1 and
enabling "xcb" USE flag. Just for curiosity. Before merging libX11-1.1.1-r1
xcb-proto-1.0 and libxcb-1.0 were installed.
In the mean time I noticed, that openoffice-2.1.0-r1 refuses to start, gives
signal 6 and tries to coredump. The reason for this was turned out to share
similarities with the above mentioned bug:

"soffice.bin: xcb_xlib.c:50: xcb_xlib_unlock: assertion `c->xlib.lock' failed."

It seems that other programs are also affected and other distributions also
have problems related to this issue. Take a look at on this:
https://bugs.launchpad.net/ubuntu/+source/libx11/+bug/87390

Removing "xcb" USE flag solves the problem. However it would be good to treat
this bug in the correct way instead of this workaround before nastier symptoms
could show up.

------- Comment #5 From Peter Fern 2007-06-05 16:55:44 0000 ------- 
You're welcome to try the libxcb ebuild from:
http://bugs.gentoo.org/show_bug.cgi?id=176839#c1

Somewhat ugly, but best way I could see of solving the problem until clients
are updated for the new xcb locking.

------- Comment #6 From Donnie Berkholz 2007-08-02 05:21:50 0000 ------- 
Please make sure you have all the latest (~arch) X libraries, particularly
these:

libX11
libXcomposite
libXdamage
libXfixes
libXi
libXrandr

Ensure that, then test again and report back with your results. Please reopen
the bug when you reply.
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