Error while fetching completions in cmdline mode

[mhdna]

Make sure you have done the following

• Updated to the latest version of blink.cmp
• Searched for existing issues and documentation (try <C-k> on https://cmp.saghen.dev)

Bug Description

Related to #925.

Trying to run a specific command such as :Tabularize from the tabular package and potentially other packages, shows this error message:

Error while fetching completions: Vim:E120: Using <SID> not in a script context: <SID>CompleteTabularizeCommand

Surprisingly, completion for commands from the vim-eunuch package mentioned in the PR work just fine.

Relevant configuration

-- Run with `nvim -u repro.lua`

vim.env.LAZY_STDPATH = ".repro"
load(vim.fn.system("curl -s https://raw.githubusercontent.com/folke/lazy.nvim/main/bootstrap.lua"))()

---@diagnostic disable-next-line: missing-fields
require("lazy.minit").repro({
	spec = {
		{
			"saghen/blink.cmp",
			-- please test on `main` if possible
			-- otherwise, remove this line and set `version = '*'`
			build = "cargo build --release",
			opts = {},
		},
		{ "godlygeek/tabular"},
	},
})

neovim version

v0.10.3

blink.cmp version

main, 5b83998