[BUG] RecipientFilter not working

[EdoTM]

I'm using the last master version of AdvExp3.
Steps to reproduce:

• Open Expression 3 Golem editor
• Write the following code:

server {
    recipientfilter r = new recipientfilter();
}

• Validate, and you'll get an error.

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The error is the following:

Internal error: addons/expadv3/lua/expression3/compiler.lua:2946: Attempt to inject _crf() but operator was incorrect nil.

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Gmod version (latest):

Protocol version 24
Exe version 2021.06.09 (garrysmod)
Exe build: 14:40:17 Jul 12 2021 (8283) (4000)