Built with --enable-debug Running under gdb gives (gdb) where #0 0x0000003d6da330c5 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64 #1 0x0000003d6da34a76 in abort () at abort.c:92 #2 0x0000003d6da6fcfb in __libc_message (do_abort=2, fmt=0x3d6db5ea98 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:186 #3 0x0000003d6da76d63 in malloc_printerr (av=<value optimized out>, p=0x7fa24c0009f0, have_lock=0) at malloc.c:6283 #4 _int_free (av=<value optimized out>, p=0x7fa24c0009f0, have_lock=0) at malloc.c:4795 #5 0x00000000004a18fe in qemu_vfree (ptr=0x7fa24c000a00) at oslib-posix.c:76 #6 0x000000000045af3d in handle_aiocb_rw (aiocb=0x7fa2dc034cd0) at posix-aio-compat.c:301 #7 0x000000000045b09a in aio_thread (unused=0x0) at posix-aio-compat.c:341 #8 0x0000003d6e206ccb in start_thread (arg=0x7fa2e1654700) at pthread_create.c:301 #9 0x0000003d6dae0c2d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115 (gdb) /Conor -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html