nmap says “variable 'keys' is not declared” trying to run ssl-ccs-injection.nse

["David Kozinn, K2DBK" <dkozinn () gmail com>]

​I'm attempting to run ssl-ccs-injection.nse using nmap 6.47 from a Windows
7 machine. I get the following error when trying to run:

​NSE: ssl-ccs-injection against example.com (10.10.10.10:443) threw an
error!
C:\Program Files (x86)\Nmap/scripts\ssl-ccs-injection.nse:123: variable
'keys' is not declared
stack traceback:
[C]: in function 'error'
C:\Program Files (x86)\Nmap/nselib/strict.lua:80: in function '__index'
C:\Program Files (x86)\Nmap/scripts\ssl-ccs-injection.nse:123: in function
'test_ccs_injection'
C:\Program Files (x86)\Nmap/scripts\ssl-ccs-injection.nse:269: in function
<C:\Program Files (x86)\Nmap/scripts\ssl-ccs-injection.nse:245>
(...tail calls...)

A couple of things I'll mention are that I've completely uninstalled and
re-installed nmap under Windows (using the version with Zenmap, though
running the command from the command-line produces the same error); I did
have to download test_ccs_injection.nse from nmap.org, and also tls.lua.

The command line I'm using is:
nmap -p 443 -d --script ssl-ccs-injection.nse --script-args vulns.showall
example.com

Any suggestions?

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