Xlib error (sequence lost in reply type 0x0) on PPC64

[Wu Zhou <woodzltc at cn dot ibm dot com>]

Hi,

I am tryig to build and run Frysk, heavily using Java-Gnome, on PPC64.  
The platform I am using is FC5 test2, with all the packages being the rawhide 
(ok, about a week ago).

Frysk build ok and start also ok.  But when I click on a random process in 
the process view, it report Xlib error: sequence lost (0x10000 > > 0x2080) 
in reply type 0x0!  There is no such error in x86 platform.

I am now suspecting that it might be related with Java-Gnome on PPC64 
(anybody else else tried Java-Gnome on this platform, please let me know. :-)

The reason is that when I attach GDB to the running Frysk, I sometimes get 
SEGV signal at cario function, such as:

(gdb) c
Continuing.
[New Thread 4398185484880 (LWP 2466)]
[New Thread 4398200185424 (LWP 2467)]
[New Thread 4398210671184 (LWP 2468)]
[Thread 4398200185424 (LWP 2467) exited]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 4398210671184 (LWP 2468)]
_cairo_surface_show_glyphs (scaled_font=0x10b2f3b0,
operator=CAIRO_OPERATOR_DEST_OUT,
    pattern=0x40009c8bec8, dst=0x0, source_x=10, source_y=2, dest_x=10, 
dest_y=2,
    width=103, height=10, glyphs=0x10d2e0a0, num_glyphs=13) at 
cairo-surface.c:1487
1487        if (dst->status)
(gdb) p dst
$1 = (cairo_surface_t *) 0x0
(gdb) bt
#0  _cairo_surface_show_glyphs (scaled_font=0x10b2f3b0,
    operator=CAIRO_OPERATOR_DEST_OUT, pattern=0x40009c8bec8, dst=0x0, 
source_x=10,
    source_y=2, dest_x=10, dest_y=2, width=103, height=10, 
glyphs=0x10d2e0a0,
    num_glyphs=13) at cairo-surface.c:1487
#1  0x000000805d8de354 in _cairo_scaled_font_show_glyphs 
(scaled_font=0x10b2f3b0,
    operator=CAIRO_OPERATOR_DEST_OUT, pattern=0x40009c8bec8, surface=0x0,
source_x=10,
    source_y=2, dest_x=10, dest_y=2, width=103, height=10, 
glyphs=0x10d2e0a0,
    num_glyphs=13) at cairo-font.c:930
#2  0x000000805d8e0048 in _cairo_gstate_show_glyphs_draw_func
(closure=0x40009c8c160,
    operator=CAIRO_OPERATOR_DEST_OUT, src=0x40009c8bec8, dst=0x0, dst_x=0, 
dst_y=0,
    extents=0x40009c8c188) at cairo-gstate.c:2053
#3  0x000000805d8e1274 in _cairo_gstate_clip_and_composite 
(clip=0x10d300a0,
    operator=CAIRO_OPERATOR_DEST_OUT, src=0x40009c8bec8,
    draw_func=@0x805d933900: 0x805d8dfef0 
<_cairo_gstate_show_glyphs_draw_func>,
    draw_closure=0x40009c8c160, dst=0x0, extents=0x40009c8c188) at
cairo-gstate.c:1094
#4  0x000000805d8e15b0 in _cairo_gstate_show_glyphs (gstate=0x10d30000,
glyphs=Variable "glyphs" is not available.
)
    at cairo-gstate.c:2131
#5  0x000000805d8d8418 in cairo_show_glyphs (cr=0x10d29ff0, 
glyphs=Variable
"glyphs" is not available.
) at cairo.c:2158
#6  0x000000805d368efc in .pango_cairo_show_glyph_string ()
   from /usr/lib64/libpangocairo-1.0.so.0
#7  0x000000805d3171e0 in .pango_renderer_draw_glyphs ()
   from /usr/lib64/libpango-1.0.so.0
#8  0x000000805d367fd0 in .pango_cairo_show_glyph_string ()
   from /usr/lib64/libpangocairo-1.0.so.0
#9  0x000000805d98542c in .gdk_draw_layout_line () from
/usr/lib64/libgdk-x11-2.0.so.0
#10 0x000000805d3171e0 in .pango_renderer_draw_glyphs ()
   from /usr/lib64/libpango-1.0.so.0
#11 0x000000805d317794 in .pango_renderer_draw_layout_line ()
   from /usr/lib64/libpango-1.0.so.0
#12 0x000000805d317b90 in .pango_renderer_draw_layout ()
   from /usr/lib64/libpango-1.0.so.0
#13 0x000000805d983c2c in .gdk_draw_layout_with_colors ()
   from /usr/lib64/libgdk-x11-2.0.so.0
---Type <return> to continue, or q <return> to quit---

Be noted that dst is zero at this point.

Any thought on this?  For a more detailed description, you can refer to 
http://sourceware.org/bugzilla/show_bug.cgi?id=2355

If you need any additional information, just let me know.  

Thanks.

- Wu Zhou