-- THIS WORKS
local minetest_register_craft = minetest.register_craft
test = function (options)
    minetest.log("action", "REGISTER CRAFT - "..options.output)
    minetest_register_craft(options)
end
test({
    output = 'node "item_info:sign_wall" 1',
    recipe = {
        {'', 'node "default:stick"', 'node "default:stick"'},
        {'', 'node "default:stick"', 'node "default:stick"'},
        {'', 'node "default:stick"', ''},
    }
})


-- THIS FAILS
local minetest_register_craft = minetest.register_craft
minetest.register_craft = function (options)
    minetest.log("action", "REGISTER CRAFT - "..options.output) -- << IF I DON'T OUTPUT THIS IT SEEMS TO WORK
    minetest_register_craft(options)
end
minetest.register_craft({
    output = 'node "item_info:sign_wall" 1',
    recipe = {
        {'', 'node "default:stick"', 'node "default:stick"'},
        {'', 'node "default:stick"', 'node "default:stick"'},
        {'', 'node "default:stick"', ''},
    }
})