#10518 HIGH 1.75-so: X crashes if Composite is turned on.

[Zarro Boogs per Child]

#10518: X crashes if Composite is turned on.
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 Reporter:  cjb              |                 Owner:  cjb          
     Type:  defect           |                Status:  new          
 Priority:  high             |             Milestone:  1.75-software
Component:  x window system  |               Version:  1.75-A1      
 Keywords:                   |           Next_action:  never set    
 Verified:  0                |   Deployment_affected:               
Blockedby:                   |              Blocking:               
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 {{{
 Program received signal SIGSEGV, Segmentation fault.
 0x00000000 in ?? ()
 (gdb) bt
 Cannot access memory at address 0x1
 Cannot access memory at address 0x1
 #0  0x00000000 in ?? ()
 #1  0x401bb9a0 in ?? () from /usr/lib/libpixman-1.so.0
 #2  0x4018a378 in ?? () from /usr/lib/libpixman-1.so.0
 #3  0x401b5f64 in ?? () from /usr/lib/libpixman-1.so.0
 #4  0x401bde2c in ?? () from /usr/lib/libpixman-1.so.0
 #5  0x401bf0ec in ?? () from /usr/lib/libpixman-1.so.0
 #6  0x401b5c34 in ?? () from /usr/lib/libpixman-1.so.0
 #7  0x4018abec in ?? () from /usr/lib/libpixman-1.so.0
 #8  0x4018abec in ?? () from /usr/lib/libpixman-1.so.0
 #9  0x4018abec in ?? () from /usr/lib/libpixman-1.so.0
 #10 0x401b6974 in pixman_image_composite () from /usr/lib/libpixman-1.so.0
 #11 0x40823950 in fbComposite () from /usr/lib/xorg/modules/libfb.so
 #12 0x000d29ac in ?? ()
 #13 0x000d29ac in ?? ()
 Backtrace stopped: previous frame identical to this frame (corrupt stack?)
 }}}

 Thinking about using composite/xcompmgr with shadowfb to try to gain some
 performance, so this is pretty annoying.

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Ticket URL: <http://dev.laptop.org/ticket/10518>
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