Segfault when -n is not used

[michaeldwong]

When main.out is executed without specifying iterations (using -n), a segfault occurs. Thanks!

./main.out  
meas_mode:0
path_out:measure/
bm:0
niter:10
w_e:1
w_p:3
st_ex:0
st_eq:0
st_avg:0
st_when_to_restart:0
st_when_to_restart_niter:0
st_start_prog:0
restart_w_e_list:1
restart_w_p_list:0
p_inst_operand:0.333333
p_inst:0.333333
set strategy MH_SAMPLER_ST_WHEN_TO_RESTART_NO_RESTART
set strategy MH_SAMPLER_ST_NEXT_START_PROG_ORIG
set w_e and w_p pairs as: 1,0
probabilities of mod_random_inst_operand, mod_random_inst, mod_random_k_cont_insts are all set as 0.333333
set strategy MH_SAMPLER_ST_WHEN_TO_RESTART_NO_RESTART
set strategy MH_SAMPLER_ST_NEXT_START_PROG_ORIG
set w_e and w_p pairs as: 1,0
probabilities of mod_random_inst_operand, mod_random_inst, mod_random_k_cont_insts are set as 0.333333, 0.333333, 0.333333
0: MOVXC 2 4
1: ADDXY 0 2
2: MOVXC 3 15
3: JMPGT 0 3 1
4: RETX 3
5: RETX 0
6: NOP

Segmentation fault (core dumped)