[Bug 27199] New: Division by Zero error with glDrawRangeElementsEXT()

[bugzilla-daemon@freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=27199

           Summary: Division by Zero error with glDrawRangeElementsEXT()
           Product: Mesa
           Version: git
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/r300
        AssignedTo: dri-devel@lists.sourceforge.net
        ReportedBy: rankincj@googlemail.com


Created an attachment (id=34243)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=34243)
Full stack 

This error kills World of Warcraft almost immediately on entering Azeroth.
(Login screens seem OK). Full stack trace is attached, but the part relevant to
R300 reads:

=Backtrace:
>0 0x7de37b40 emit_zb_offset+0x50() in r300_dri.so (0x0039f1fc)
  1 0x7de4b872 radeonEmitState+0x4b2() in r300_dri.so (0x0039f26c)
  2 0x7de32f20 r300DrawPrims+0xc30() in r300_dri.so (0x0039f31c)
  3 0x7dee657b vbo_validated_drawrangeelements+0x10b() in r300_dri.so
(0x0039f38c)
  4 0x7dee69a4 vbo_exec_DrawRangeElements+0x54() in r300_dri.so (0x0039f3bc)
  5 0x7dedafcb neutral_DrawRangeElements+0xab() in r300_dri.so (0x0039f3ec)
  6 0x7ed78291 wine_glDrawRangeElementsEXT+0xb1() in opengl32 (0x0039f44c)

This is with Mesa-git, xf86-drv-ati from git, libdrm-2.4.18 from F13, vanilla
kernel 2.6.33.1.


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