Witness_node crashes on exit

[abitmore]

Bug Description

Plugins enabled: plugins="witness market_history"
Logs:

444163ms th_a       application.cpp:678           handle_block         ] Got block: #76156912 048a0ff0c9325486a689eb4ab080d4c10e3fbb58 time: 2023-01-23T09:07:24 transaction(s): 1 latency: 163 ms from: roelandp  irreversible: 76156893 (-19) 
445105ms th_a       application.cpp:740           handle_transaction   ] Got 1 transactions from network
446185ms fc::asio   main.cpp:214                  operator()           ] Caught SIGINT, attempting to exit cleanly
446186ms th_a       main.cpp:234                  main                 ] Exiting from signal 2
446192ms th_a       application.cpp:1169          ~application         ] Application quitting
446193ms th_a       application.cpp:1080          shutdown             ] Shutting down application
446197ms th_a       application.cpp:1088          shutdown             ] Shutting down plugins
446212ms th_a       stacktrace.cpp:45             segfault_signal_hand ]  0# 0x000055E5F834856C in ./witness_node.6.1.0
 1# 0x00007FEE2E359090 in /lib/x86_64-linux-gnu/libc.so.6
 2# graphene::app::detail::application_impl::shutdown_plugins() const in ./witness_node.6.1.0
 3# graphene::app::detail::application_impl::shutdown() in ./witness_node.6.1.0
 4# graphene::app::application::~application() in ./witness_node.6.1.0
 5# 0x000055E5F7A7C87E in ./witness_node.6.1.0
 6# main in ./witness_node.6.1.0
 7# __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6
 8# _start in ./witness_node.6.1.0

./start_witness_node.sh: line 2:  1337 Aborted                 (core dumped) ./witness_node.6.1.0 --enable-standby-votes-tracking=false --p2p-endpoint="0.0.0.0:1776" --rpc-endpoint="127.0.0.1:8090" --plugins="witness market_history" --ignore-api-helper-indexes-warning --required-participation=0

Impacts
Describe which portion(s) of BitShares Core may be impacted by this bug. Please tick at least one box.

• API (the application programming interface)
• Build (the build process or something prior to compiled code)
• CLI (the command line wallet)
• Deployment (the deployment process after building such as Docker, Travis, etc.)
• DEX (the Decentralized EXchange, market engine, etc.)
• P2P (the peer-to-peer network for transaction/block propagation)
• Performance (system or user efficiency, etc.)
• Protocol (the blockchain logic, consensus, validation, etc.)
• Security (the security of system or user data, etc.)
• UX (the User Experience)
• Other (please add below)

Host Environment
Please provide details about the host environment. Much of this information can be found running: witness_node --version.

• Host OS: Ubuntu 20.04.5 LTS
• Host Physical RAM 8GB
• BitShares Version: 6.1.0
• OpenSSL Version: 1.1.1s
• Boost Version: 1.65.1

Additional Context (optional)
The witness_node binary is downloaded from the release page.

CORE TEAM TASK LIST

• Evaluate / Prioritize Bug Report
• Refine User Stories / Requirements
• Define Test Cases
• Design / Develop Solution
• Perform QA/Testing
• Update Documentation