segment fault happen at insert and update of sort type

[Lin,Xiang]

Segmentation fault (core dumped) numactl --cpunodebind=0 --membind=0 ./bench -latency=1 -populate=1 -value_size=4096 -threads=64 -time=10 -path=/mnt/pmem0/kvdk -num=26163299 -space=536870912000 -max_write_threads=64 -fill=0 -type=sorted -read_ratio=0 -existing_keys_ratio=0 > ./results/sorted_vs4096_insert_thread64

Segmentation fault (core dumped) numactl --cpunodebind=0 --membind=0 ./bench -latency=1 -populate=1 -value_size=4096 -threads=64 -time=10 -path=/mnt/pmem0/kvdk -num=26163299 -space=536870912000 -max_write_threads=64 -fill=0 -type=sorted -read_ratio=0 > ./results/sorted_vs4096_update_thread64

please take a look.

[peifeng si]

Fixed at commit ede598a
Please have a try again. thanks!

[Lin,Xiang]

issue not happened with sort type and latency disable