`opt.get_option` in `on_attach()` returns `nil` for unset options

[brainplot]

When I try to active completion-nvim in my init.lua with the on_attach function, I get a bunch of errors.

Error running config for completion-nvim: ...ite/pack/packer/start/completion-nvim/lua/completion.lua:251: bad argument #1 to 'ipairs' (table expected, got nil)

If we look at the offending line:

completion-nvim/lua/completion.lua

Lines 246 to 255 in 139fb6c

	M.on_attach = function(option)
	-- setup completion_option tables
	opt.set_option_table(option)
	local disable_filetypes = opt.get_option("disable_filetypes")
	local ft = vim.bo.filetype
	for _, disable_ft in ipairs(disable_filetypes) do
	if ft == disable_ft then
	return
	end
	end

disable_filetypes which is returned by get_options is nil the moment ipairs is called. I tried to manually edit the file and add disable_filetypes = disable_filetypes or {} at line 250 but I got basically the same error elsewhere.

Error running config for completion-nvim: ...ite/pack/packer/start/completion-nvim/lua/completion.lua:266: bad argument #1 to 'len' (string expected, got nil)

which is basically the same error.

completion-nvim/lua/completion.lua

Lines 265 to 270 in 139fb6c

	if string.len(opt.get_option('confirm_key')) ~= 0 then
	api.nvim_buf_set_keymap(0, 'i', opt.get_option('confirm_key'),
	'pumvisible() ? complete_info()["selected"] != "-1" ? "\\<Plug>(completion_confirm_completion)" :'..
	' "\\<c-e>\\<CR>" : "\\<CR>"',
	{silent=false, noremap=false, expr=true})
	end

string.len() is getting nil as its argument.

My testing minimal init.lua

require('completion').on_attach()

(literally my one-line init.lua created in a temporary home directory)

Expected behavior
I expect not to get errors when I call on_attach. Perhaps get_options should handle missing options better (?)