Crash Observed for JSON Conversion of Enum value

[ArpitGupta05]

Thread 3 "netopeer2-serve" received signal SIGSEGV, Segmentation fault.
0x00007f79cef960e2 in summary_route_cost_modeopenconfig_network_instance_network_instances_openconfig_network_instance_network_instances_network_instance_inner_protocols_protocol_inner_ospfv2_global_config_ToString ()
from /usr/local/lib/libsonic_network_management_apis.so
(gdb) bt
#0 0x00007f79cef960e2 in summary_route_cost_modeopenconfig_network_instance_network_instances_openconfig_network_instance_network_instances_network_instance_inner_protocols_protocol_inner_ospfv2_global_config_ToString ()
from /usr/local/lib/libsonic_network_management_apis.so
#1 0x00007f79cef96274 in openconfig_network_instance_network_instances_openconfig_network_instance_network_instances_network_instance_inner_protocols_protocol_inner_ospfv2_global_config_convertToJSON ()
from /usr/local/lib/libsonic_network_management_apis.so
#2 0x00007f79cef95d6f in openconfig_network_instance_network_instances_openconfig_network_instance_network_instances_network_instance_inner_protocols_protocol_inner_ospfv2_global_convertToJSON ()
from /usr/local/lib/libsonic_network_management_apis.so
#3 0x00007f79cef92123 in openconfig_network_instance_network_instances_openconfig_network_instance_network_instances_network_instance_inner_protocols_protocol_inner_ospfv2_convertToJSON ()
from /usr/local/lib/libsonic_network_management_apis.so
#4 0x00007f79cef839f0 in openconfig_network_instance_network_instances_openconfig_network_instance_network_instances_network_instance_inner_protocols_protocol_inner_convertToJSON ()
from /usr/local/lib/libsonic_network_management_apis.so
#5 0x00007f79cef8358f in openconfig_network_instance_network_instances_openconfig_network_instance_network_instances_network_instance_inner_protocols_convertToJSON () from /usr/local/lib/libsonic_network_management_apis.so
#6 0x00007f79cef7fd11 in openconfig_network_instance_network_instances_openconfig_network_instance_network_instances_network_instance_inner_convertToJSON () from /usr/local/lib/libsonic_network_management_apis.so
#7 0x00007f79cefbcf10 in patch_openconfig_network_instance_network_instances_network_instance_convertToJSON ()
from /usr/local/lib/libsonic_network_management_apis.so
#8 0x00007f79cf6083e4 in OpenconfigNetworkInstanceAPI_patchOpenconfigNetworkInstanceNetworkInstancesNetworkInstance () from /usr/local/lib/libsonic_network_management_apis.so
#9 0x00007f79cf95520e in restc_patch_openconfig_network_instance_network_instances_network_instance ()
from /usr/local/lib/libsonic_network_management_apis.so
#10 0x000056116e818271 in np2srv_openconfig_network_instance_network_instances_network_instance_cb (
session=0x7f79ac000b90, UNUSED_sub_id=30, UNUSED_module_name=0x56116ee05a00 "openconfig-network-instance",
xpath=0x56116e970eb0 "/openconfig-network-instance:network-instances/network-instance",
UNUSED_event=SR_EV_DONE, UNUSED_request_id=1, UNUSED_private_data=0x0)
--Type for more, q to quit, c to continue without paging--
at /home/arpit/sonic/local_netconf_server/netopeer2/src/netconf_openconfig_network_instance.c:105
#11 0x00007f79cfbc6ce5 in sr_shmsub_change_listen_process_module_events (change_subs=0x56116e8f3928,
conn=0x56116e8accc0) at /home/arpit/sonic/local_netconf_server/sysrepo/src/shm_sub.c:2667
#12 0x00007f79cfb87788 in sr_subscription_process_events (subscription=0x56116edfaa10, session=0x0,
stop_time_in=0x7f79cc8e4ad0) at /home/arpit/sonic/local_netconf_server/sysrepo/src/sysrepo.c:4091
#13 0x00007f79cfbc9899 in sr_shmsub_listen_thread (arg=0x56116edfaa10)
at /home/arpit/sonic/local_netconf_server/sysrepo/src/shm_sub.c:3783
#14 0x00007f79cfd68fa3 in start_thread (arg=) at pthread_create.c:486
#15 0x00007f79ce9674cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95