[xorg-bugzilla-noise] [Bug 1390] New: Server crash under specific operation

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https://freedesktop.org/bugzilla/show_bug.cgi?id=1390        
   
           Summary: Server crash under specific operation
           Product: xorg
           Version: 6.8.0
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P1
         Component: Server/general
        AssignedTo: xorg-bugzilla-noise at freedesktop.org
        ReportedBy: jsberg at bnl.gov


Server 6.8.0, built with gcc-3.4.2 (same result with 3.4.1).  Using the mga
driver.  I'm attaching my host.def.  The server crashes when, under gnome-2.6
using yelp-2.6.3 (the help browser), I get to a point where it has a table of
contents with arrows on the left (try Desktop->User Guide).  Enter the arrow,
then leave; the server segfaults on exiting the arrow.  The readable part of the
backtrace is

#53 0x0819f70d in miComputeCompositeClip ()
#54 0x0815a22f in damagePolylines ()
#55 0x080bcadc in ProcPolyLine ()
#56 0x080c0bf1 in Dispatch ()
#57 0x080cca4c in main ()        
   
   
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