bug: setting merge_keywords to false breaks TodoTelescope

[j-barnak]

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• I have read all the todo-comments.nvim docs
• I have searched the existing issues of todo-comments.nvim
• I have searched the existing issues of plugins related to this issue

Neovim version (nvim -v)

NVIM v0.9.0

Operating system/version

Ubuntu 22.04.2 LTS

Describe the bug

If you set merge_keywords to false, it breaks the command TodoTelescope. I was trying to only include
FIXMEs in the highlights and Telescope, but I get presented with an error

Here's the configuration.

Steps To Reproduce

1. Omit Keywords and only include a subset
2. Run :TodoTelescope

Expected Behavior

I expect the Telescope results to only show FIXMEs

Repro

return {
  "folke/todo-comments.nvim",
  dependencies = {
    "nvim-lua/plenary.nvim",
    "nvim-telescope/telescope.nvim",
  },
  cmd = { "TodoTelescope" },
  event = { "BufReadPost", "BufNewFile" },
  config = true,
  opts = {
    signs = false,
    keywords = {
      FIX = {
        color = "#56B6C2",
        alt = { "FIXME", "BUG", "FIXIT", "ISSUE" },
      },
    },
    merge_keywords = false,
  },
  keys = {
    { "<leader>ft", "<cmd>TodoTelescope<cr>", desc = "Todo" },
  },
}

[dandyrow]

I have found this bug too. I thought there was something wrong as I installed the plugin but it wasn't working with Telescope. Disabled merge_keywords and it started working

[b0ae989c]

This more of a missing config issue. You need to provided icon when you set merge_keywords = false. Otherwise Telescope entry maker will fail.