Nmap 5.50 crashing: Assertion `timeout_msecs >= 0' failed

[Vlatko Kosturjak <kost () linux hr>]

I run nmap scan on Linux/Ubuntu host against 5 hosts:

nmap -P0 --script=all -sS -sV --traceroute -v -O -iL 5hosts.txt -oA output.txt

and this is what I got:

Initiating Service scan at 12:13
Scanning 10 services on 5 hosts
Completed Service scan at 12:13, 18.92s elapsed (10 services on 5 hosts)
Initiating OS detection (try #1) against 5 hosts
Retrying OS detection (try #2) against 5 hosts
Initiating Traceroute at 12:13
Completed Traceroute at 12:13, 3.28s elapsed
Initiating Parallel DNS resolution of 22 hosts. at 12:13
Completed Parallel DNS resolution of 22 hosts. at 12:13, 0.20s elapsed
NSE: Script scanning 5 hosts.
NSE: Starting runlevel 1 (of 4) scan.
Initiating NSE at 12:13
NSE: FIREWALK: can't run without one of the script args firewalk.gateway or firewalk.ttl
NSE: FIREWALK: can't run without one of the script args firewalk.gateway or firewalk.ttl
NSE: FIREWALK: can't run without one of the script args firewalk.gateway or firewalk.ttl
NSE: FIREWALK: can't run without one of the script args firewalk.gateway or firewalk.ttl
NSE: FIREWALK: can't run without one of the script args firewalk.gateway or firewalk.ttl
Stats: 0:04:41 elapsed; 0 hosts completed (5 up), 5 undergoing Script Scan
NSE: Active NSE Script Threads: 10 (4 waiting)

NSE Timing: About 96.06% done; ETC: 12:16 (0:00:08 remaining)
nmap: nsock_event.c:375: msevent_new: Assertion `timeout_msecs >= 0' failed.
Aborted

Sorry, currently can't provide more right now, but can provide debug output later if you think you need more info...?  
-- 
Vlatko Kosturjak - KoSt
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