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http://bugs.xfree86.org/show_bug.cgi?id=512
------- Additional Comments From [EMAIL PROTECTED] 2004-03-08 19:59 -------
As I suspected, I'm finding more places where the X server segfaults due to null
pointers in structures. The latest is as follows:
#0 0x09534d7b in _tnl_copy_immediate_vertices (ctx=0x9c0d790, next=0x9cae520)
at t_imm_fixup.c:409
#1 0x09530d37 in _tnl_execute_cassette (ctx=0x9c0d790, IM=0x9cae520) at
t_imm_exec.c:456
#2 0x0951a491 in _tnl_flush_immediate (IM=0x9cae520) at t_imm_api.c:70
#3 0x0951bd0a in _tnl_Vertex3fv (v=0xbab8b530) at t_imm_api.c:869
#4 0x09314a0b in glVertex3fv (v=0xbab8b530) at glapitemp.h:1571
#5 0x0926559c in __glXDisp_Vertex3fv (pc=0xbab8b530 "\201\"\027?\0206\210?") at
g_render.c:613
#6 0x092b4140 in __glXRender (cl=0x9868f90, pc=0xbab8b52c "\020") at glxcmds.c:1188
#7 0x092baedf in __glXDispatch (client=0x98580b0) at glxext.c:431
#8 0x080cc86d in Dispatch () at dispatch.c:450
#9 0x080e2873 in main (argc=3, argv=0xbfec3b64, envp=0xbfec3b74) at main.c:435
#10 0x00b81770 in __libc_start_main () from /lib/tls/libc.so.6
The second line of code in function _tnl_copy_immediate_vertices looks like:
struct immediate *prev = tnl->ExecCopySource;
but the value of "tnl" is null so it segfaults.
I'm sure this is related to most of the problems above where I'm trying to index
off null pointers.
Does someone understand what the ExecCopySource is and what might cause it to be
null? This only happens when Xinerama is enabled, and I believe it became a
problem when going from 4.2 to 4.3.
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