[Bug 5721] New: doom3 segfaults sometimes in the _tnl_DrawElements code

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https://bugs.freedesktop.org/show_bug.cgi?id=5721          
     
           Summary: doom3 segfaults sometimes in the _tnl_DrawElements code
           Product: Mesa
           Version: CVS
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Drivers/DRI/r200
        AssignedTo: dri...@li...
        ReportedBy: rsc...@gm...


Even with tcl_mode=0 (on the radeon 9000pro) doom3 sometimes segfaults. It's
kinda hard to trigger, but it seems to happen always around the same places (one
place is at the end of the game, just some moments before approaching the
cyberdemon - just walking by there has a chance of around 20% to crash). There
are also some obvious rendering errors there (looks like misspecified polyons or
something like that, though it could just be z-fighting issues) which may be
related.
Program received signal SIGSEGV, Segmentation fault
#0  0x3c44e509 in loopback_Color4ubv_f (
    v=0x11e57638 <Address 0x11e57638 out of bounds>) at main/api_loopback.c:280
#1  0x3c37a158 in _ae_loopback_array_elt (elt=1290) at main/api_arrayelt.c:788
#2  0x3c47768f in fallback_drawelements (ctx=Variable "ctx" is not available.
) at tnl/t_array_api.c:75
#3  0x3c477c25 in _tnl_DrawElements (mode=4, count=306, type=5125,
    indices=0x666) at tnl/t_array_api.c:375
#4  0x08156450 in ?? ()

(Now, with indices 666 it must just go wrong :-). Though "mode" and "type"
always seem to be the same.)
I'd suspect it's not a r200 driver specific problem, but I'd need days until I
would hit a crash with the software renderer...          
     
     
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