variable 'htmlparser_opts' is not declared

[PR0J3CT12]

Im getting error "variable 'htmlparser_opts' is not declared" after local htmlparser = require ("htmlparser"). How can i fix it?

[msva]

Can you add more information, please?

1. how did you installed package?
2. how do you use it (interactively, or in script)
3. can you post full stacktrace, please?

[PR0J3CT12]

Mb im doing something wrong, but im trying to use library in nse(nmap scripting engine). Im not sure, that i can use libraries like in pure lua.

1. luarocks install htmlparser
2. as i said before, im trying to use it in nse script

/usr/local/share/lua/5.3/htmlparser.lua:14: variable 'htmlparser_opts' is not declared
stack traceback:
	[C]: in function 'error'
	/usr/bin/../share/nmap/nselib/strict.lua:80: in metamethod '__index'
	/usr/local/share/lua/5.3/htmlparser.lua:14: in main chunk
	[C]: in function 'require'
	/usr/bin/../share/nmap/scripts/http-ssrf.nse:14: in function </usr/bin/../share/nmap/scripts/http-ssrf.nse:1>

UPD:
lib "gumbo" is working with nse, as i can see, idk why)

[msva]

It seems, this engine redefines the metatables, and this causes a problem (originally the line it points to calls a function that checks if htmlparser_opts is a table, and it being nil is originally acceptable option (it just won't return anything).

Also, I just tested on clean lua5.3 and there is no such error. So it is definitelly the engine's who is guilty.

As a workaround I suggest you to just define htmlparser_opts (global) variable as ampty table (or not empty, if you want to modify some settings) before require"htmlparser".