Bug: Tmux has problems rendering symbols/icons from the LSP (Solved)

[envico801]

Self Checks

• I'm using the latest lualine.
• I didn't find the issue in existing issues or PRs.

How to reproduce the problem

I have already solved this problem, I am just leaving this message for future generations. This problem is probably duplicated so I apologize in advance.

Steps:

1. Install some nvim LSP of your choice, for example in my case it is lua.
2. Open some file in which a problem is detected (according to the LSP), for example an incomplete syntax, or some warning about something ⚠

The problem is caused by using “weird” symbols/icons in the diagnostics section

For example:

    lualine_x = {
      {
        get_active_lsp,
        icon = " LSP:",
      },
      {
        "diagnostics",
        sources = { "nvim_diagnostic" },
        -- This line is the one that causes problems:
        symbols = { error = "🆇 ", warn = "⚠️ ", info = "ℹ️ ", hint = " " },
      },
    },

Solution:

        -- Use other types of icons, e.g.
        symbols = { error = "● ", warn = "▲ ", info = "■ ", hint = "◆ " }

Expected behaviour

Basically that a color does not appear when I want to use “/” or “:”.

Actual behaviour

When you try to use the “/” or “:” keys inside nvim it will cause that extra little square to be generated in the command line and it will stay there until you change the file. It only appears once the LSP is fully loaded, it's like lualine doesn't update correctly when the LSP adds some diagnostic icon to the status line.

Minimal config to reproduce the issue

• My lualine configuration
• My lazy configuration
• My complete nvim configuration (in case you want to see how it is structured)
• My tmux configuration I don't think it has any influence.

Additional information

Maybe I am the only one who did not read the documentation.