Created attachment 970408 [details]
stall.cpp

+++ This bug was initially created as a clone of Bug #1043381 +++

Description of problem:
make GUI software with the use of OpenMotif.If operating this software and inputting any character (ex. pushing [a] key), software is stalled.

Version-Release number of selected component (if applicable):
openmotif-devel-2.3.3-*

How reproducible:
Always

Steps to Reproduce:
1. install libX11 and OpenMotif-devel
compile stall.cpp

  (Ex.)
  # g++ -o sample stall.cpp -I/usr/include -lXm -lX11

2. Click text box on "Main" window to be able to input text.
3. Push any key such as [a], and don't release it during the following steps.
4. Keep pushing the key, and click "Sub Open" button, then "SUB" window will be opened.
5. Still keep pushing the key, and click "Sub EXIT" button in "SUB" window, then the window will be closed.
6. Repeat step 4 and 5.

Actual results:
The program stalls in a few times to repeat step 4 and 5.


Expected results:
The program doesn't stall. Actually, when you run non_stall instead of stall, you don't see the stall.

--- Additional comment on 2014-04-04 03:51:43 EDT ---

> What is the difference between the stall and non_stall code?

-	String strPreeditType = const_cast<char*>("None");
+	String strPreeditType = const_cast<char*>("OverTheSpot");

non_stall uses "None" instead of "OverTheSpot".

--- Additional comment on 2014-04-14 14:00:07 EDT ---

It seems to be a xcb problem:

#0  0x00007f6389986308 in poll () from /lib64/libc.so.6
#1  0x00007f638876caaa in _xcb_conn_wait (c=0xd12f50, 
    cond=<value optimized out>, vector=0x0, count=0x0) at xcb_conn.c:400
#2  0x00007f638876e1c8 in xcb_wait_for_event (c=0xd12f50) at xcb_in.c:517
#3  0x00007f638a41e6e8 in _XReadEvents (dpy=0xd10c80) at xcb_io.c:400
#4  0x00007f638a4054f0 in XIfEvent (dpy=0xd10c80, event=0x7fffaedcf800, 
    predicate=0x7f638a43cc70 <_CheckCMEvent>, arg=0xd5cff0 "@fq\212c\177")
    at IfEvent.c:68