http://bugzilla.suse.com/show_bug.cgi?id=1042012
http://bugzilla.suse.com/show_bug.cgi?id=1042012#c2
--- Comment #2 from Dr. Werner Fink ---
With disassemble /s to_cdata in gdb I see
248 if (!cd) {
0x0000000000619314 <+116>: je 0x619375
249 lua_pushnil(L);
250 return NULL;
251 }
252 *ct = cd->type;
=> 0x0000000000619316 <+118>: movdqa (%rax),%xmm0
253 lua_getuservalue(L, idx);
0x000000000061931a <+122>: mov %r13d,%esi
0x000000000061931d <+125>: mov %rbx,%rdi
that is that movdqa instruction does cause the segementation fault:
Transcript written on luaimage.log.
../../../texk/web2c/luatexdir/luaimage.test: line 12: 31382 Segmentation fault
(core dumped) ./luatex -ini luaimage
FAIL luatexdir/luaimage.test (exit status: 1)
On frame above the function to_cdata() its self is called with
Dump of assembler code for function check_cdata:
../../../texk/web2c/luatexdir/luaffi/ctype.c:
269 {
0x0000000000619390 <+0>: push %r13
0x0000000000619392 <+2>: push %r12
0x0000000000619394 <+4>: mov %esi,%r12d
0x0000000000619397 <+7>: push %rbp
0x0000000000619398 <+8>: push %rbx
0x0000000000619399 <+9>: mov %rdx,%rbx
0x000000000061939c <+12>: mov %rdi,%rbp
0x000000000061939f <+15>: sub $0x8,%rsp
270 void* p = to_cdata(L, idx, ct);
0x00000000006193a3 <+19>: callq 0x6192a0
271 if (ct->type == INVALID_TYPE) {
=> 0x00000000006193a8 <+24>: testb $0x7c,0x19(%rbx)
270 void* p = to_cdata(L, idx, ct);
0x00000000006193ac <+28>: mov %rax,%r13
271 if (ct->type == INVALID_TYPE) {
0x00000000006193af <+31>: jne 0x6193c5
--
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