fatal: Trying to delete NSI, but could not find 1 of the purportedly pending events on that IOD.

[dksslq]

Very legacy error reproduced
When I do a mass 'pcap read' related script scan on windows, it's happening
Syn-scan finish and a few minutes after the NSE scan begins:

1. unexpected value of nse->iod pointer.
2. double fatal print out, its occasionally. (is nmap multi-threading or ... excpt-catch?)

To Reproduce
Just type command bellow if you owned a big network for testing.
If you running nmap-7.95 official release (which not applied commit 13be028 "nse_dnet: try raw Ethernet sends if raw sockets don't work, e.g. Windows"), you should nmap with right-click "Run as Administrator", if not, scripts will stop by threwing error permission-related on that case

nmap -n -Pn -sS --min-parallelism 2048 --min-hostgroup 2048 -vvvv -d --script broadcast-ataoe-discover.nse,broadcast-dhcp-discover.nse,broadcast-eigrp-discovery.nse,broadcast-igmp-discovery.nse,broadcast-listener.nse,broadcast-ospf2-discover.nse,broadcast-pim-discovery.nse,broadcast-ping.nse,broadcast-sonicwall-discover.nse,eap-info.nse,firewalk.nse,firewall-bypass.nse,http-vuln-cve2009-3960.nse,ip-forwarding.nse,ipidseq.nse,ipv6-node-info.nse,knx-gateway-discover.nse,llmnr-resolve.nse,lltd-discovery.nse,mrinfo.nse,mtrace.nse,multicast-profinet-discovery.nse,path-mtu.nse,profinet-cm-lookup.nse,qscan.nse,rpcap-brute.nse,rpcap-info.nse,smb-enum-services.nse,sniffer-detect.nse,snmp-brute.nse,targets-ipv6-multicast-echo.nse,targets-ipv6-multicast-invalid-dst.nse,targets-ipv6-multicast-slaac.nse,targets-sniffer.nse,tftp-version.nse,tls-ticketbleed.nse,url-snarf.nse --remove-it-f7 --script-trace -iR 2048

Or a simpler and more violent version to spray all of nse scripts

nmap -n -Pn -sS --remove-it-9d --min-parallelism 2048 --min-hostgroup 2048 -vvvv -d --script "*" --script-trace -iR 2048

You should probably pass --min-rate with a large number to shorten the time
2048 becomes higher etc...

Expected behavior
Scan finish normally

Version info (please complete the following information):
nmap 7.95 relase or vcs latest commits.
Nmap version 7.95 ( https://nmap.org )
Platform: i686-pc-windows-windows
Compiled with: nmap-liblua-5.4.6 openssl-3.0.13 nmap-libssh2-1.11.0 nmap-libz-1.3.1 nmap-libpcre2-10.43 Npcap-1.79 nmap-libdnet-1.12 ipv6
Compiled without:
Available nsock engines: iocp poll select

Additional context

[dksslq]

For test, I inserted a print line into function nsock_iod_delete()

[dksslq]

Looks like a overflow vuln.