Strange error when using XQueryTree() function

[Alexei Babich]

Hello,

I try to use X Windows System (Xephyr from "xorg-server 1.6.1-1" package in ArchLinux).
After compilation and starting of test program (see attach file), I get:

---
[impatt at kb33 x11]$ g++ -g -O0 ./composite_error_test.cc -lX11 -lXcomposite
-lXrender -lXdamage
[impatt at kb33 x11]$ ./a.out
XDamage version 1:1
XComposite version 0:3
XFixes version 4:0
XRender version 0:10
XShape version 1:1
X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  154 (Composite)
  Minor opcode of failed request:  6 ()
  Serial number of failed request:  30
  Current serial number in output stream:  33
---

What is the reason of it?

Thank you.

-- 
Regards,
Alexei Babich, circuit design engineer, Rezonans plc., Chelyabinsk, Russia
http://www.rez.ru
Jabber ID: impatt at jabber.ru
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