Comment 10 for bug 932487

coroutine issue again, when booting tinycore_3.3.iso:

C:\msys\home\User\qemu\i386-softmmu>gdb --args qemu-system-i386.exe -L ..\pc-bios -cdrom tinycore_3.3.iso
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Reading symbols from C:\msys\home\User\qemu\i386-softmmu/qemu-system-i386.exe...
done.
(gdb) r
Starting program: C:\msys\home\User\qemu\i386-softmmu/qemu-system-i386.exe -L ..
\\pc-bios -cdrom tinycore_3.3.iso
[New Thread 10072.0x2318]
[New Thread 10072.0x2050]
[New Thread 10072.0x29fc]
*** stack smashing detected ***: terminated

Program received signal SIGILL, Illegal instruction.
[Switching to Thread 10072.0x29fc]
0x00634a4a in fail.isra.0 ()
(gdb) bt
#0 0x00634a4a in fail.isra.0 ()
#1 0x00634ab2 in __stack_chk_fail ()
#2 0xa6782315 in ?? ()
#3 0x00000bda in ?? ()
#4 0x00000001 in ?? ()
#5 0x0044b9b9 in qemu_coroutine_switch (from_=0x22f848, to_=0x7c92e920,
    action=0) at coroutine-win32.c:50
#6 0x000cef9f in ?? ()
#7 0x0022f848 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
(gdb)

http://<email address hidden>/msg103426.html may refer to this too.