Neovim - using patched nerdfont but icon not working

Question

I am using neovim 0.9. I liked JetBrains Mono font so I downloaded the nerd font patched JetBrains font and installed on my Linux Mint 21.1. All is well except when there is an error, neovim displays this weird icon if the linter/checker gets an error.

How can I fix this?

Update 6/13/2023.

I think I am missing an icon set. Do you know where I can get these icons?

Answer 1

To display icons linter/checker/LSP messages, you could configure Neovim diagnostics.

• Neovim diagnostics documentation
• lsp-config plugin UI Customization

My Neovim Lua configuration for diagnostic with icons for Error, Warn, Hint, Info:

-- Configuration for diagnostics
local signs = {
  { name = 'DiagnosticSignError', text = '' },
  { name = 'DiagnosticSignWarn', text = '' },
  { name = 'DiagnosticSignHint', text = '' },
  { name = 'DiagnosticSignInfo', text = '' },
}

for _, sign in ipairs(signs) do
  vim.fn.sign_define(sign.name, { texthl = sign.name, text = sign.text, numhl = '' })
end

local config = {
  signs = {
    active = signs, -- show signs
  },
  update_in_insert = false,
  underline = true,
  severity_sort = true,
  float = {
    focusable = true,
    style = 'minimal',
    border = 'single',
    source = 'always',
    header = 'Diagnostic',
    prefix = '',
  },
}

vim.diagnostic.config(config)