Can't disable sources

[vunhatchuong]

I use the config in the README:

return {
    {
        "saghen/blink.cmp",
        lazy = false, -- lazy loading handled internally
        -- optional: provides snippets for the snippet source
        dependencies = "rafamadriz/friendly-snippets",

        -- use a release tag to download pre-built binaries
        version = "v0.*",
        -- OR build from source, requires nightly: https://rust-lang.github.io/rustup/concepts/channels.html#working-with-nightly-rust
        -- build = 'cargo build --release',
        -- If you use nix, you can build from source using latest nightly rust with:
        -- build = 'nix run .#build-plugin',

        ---@module 'blink.cmp'
        ---@type blink.cmp.Config
        --- @diagnostic disable: missing-fields
        opts = {
            -- 'default' for mappings similar to built-in completion
            -- 'super-tab' for mappings similar to vscode (tab to accept, arrow keys to navigate)
            -- 'enter' for mappings similar to 'super-tab' but with 'enter' to accept
            -- see the "default configuration" section below for full documentation on how to define
            -- your own keymap.
            keymap = { preset = "default" },

            appearance = {
                -- Sets the fallback highlight groups to nvim-cmp's highlight groups
                -- Useful for when your theme doesn't support blink.cmp
                -- will be removed in a future release
                use_nvim_cmp_as_default = true,
                -- Set to 'mono' for 'Nerd Font Mono' or 'normal' for 'Nerd Font'
                -- Adjusts spacing to ensure icons are aligned
                nerd_font_variant = "mono",
            },

            -- default list of enabled providers defined so that you can extend it
            -- elsewhere in your config, without redefining it, via `opts_extend`
            sources = {
                default = {},
                -- You may also define providers per filetype
                per_filetype = {
                    lua = { "buffer" },
                },
                -- optionally disable cmdline completions
                cmdline = {},
            },

            -- experimental signature help support
            -- signature = { enabled = true }
        },
        -- allows extending the providers array elsewhere in your config
        -- without having to redefine it
        opts_extend = { "sources.default" },
    },
}

Problem:

I put default = {} to disable all sources, filetype lua with only buffer source and disable cmdline. None of them works.

Version:

v0.7.6

[vunhatchuong]

I'm able to reproduce this also with lazy.nvim Minit.

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

--- @diagnostic disable: missing-fields
require("lazy.minit").repro({
    spec = {
        {
            "saghen/blink.cmp",
            dependencies = "rafamadriz/friendly-snippets",

            version = "v0.*",
            opts_extend = { "sources.default" },

            ---@module 'blink.cmp'
            ---@type blink.cmp.Config
            opts = {
                keymap = { preset = "enter" },
                sources = {
                    default = {},
                    per_filetype = {
                        lua = { "buffer" },
                    },
                    cmdline = {},
                },
            },
        },
    },
})

Despite an empty default and only buffer for lua, I'm still able to see completion for path and snippet.

[vunhatchuong]

I'm so stupid I use a tag version and look at main docs...