BT:
#0 0x00000032f0477d20 in strcmp () from /lib64/libc.so.6
#1 0x00000000004071bb in get_option_parameter (list=0x6447e0, name=0x432dc9
"size")
at qemu-option.c:162
#2 0x0000000000408848 in append_option_parameters (dest=<value optimized out>,
list=0x642460) at qemu-option.c:383
#3 0x0000000000405143 in img_create (argc=6, argv=0x7fffa40081e0) at
qemu-img.c:303
#4 0x00000032f041d8b4 in __libc_start_main () from /lib64/libc.so.6
#5 0x0000000000403099 in _start ()--Xudong
