bug: incorrect separator color for lualine buffer

[kdheepak]

Neovim version (nvim -v)

NVIM v0.11.0-dev-315+g46187117c Build type: RelWithDebInfo LuaJIT 2.1.1716656478 Run "nvim -V1 -v" for more info

Terminal / multiplexer

alacritty / zellij

Describe the bug

From repro.lua (test.lua):

$ nvim -u test.lua test.lua README.md aliases -c ":bnext"

Repro

vim.o.packpath = "/tmp/nvim/site"

local plugins = {
  rose_pine = "https://github.com/rose-pine/neovim",
  lualine = "https://github.com/nvim-lualine/lualine.nvim",
}

for name, url in pairs(plugins) do
  local install_path = "/tmp/nvim/site/pack/test/start/" .. name
  if vim.fn.isdirectory(install_path) == 0 then
    vim.fn.system({ "git", "clone", "--depth=1", url, install_path })
  end
end

require("rose-pine").setup({
  styles = {
    bold = true,
    italic = false,
    transparency = true,
  },
  highlight_groups = {
    Comment = { italic = true },
  },
})

require("lualine").setup({
  options = {
    icons_enabled = true,
  },
  sections = {
    lualine_a = { "mode" },
    lualine_b = { "branch", "diff", "diagnostics" },
    lualine_c = { { "filename", path = 1 } },
    lualine_x = { "encoding", "fileformat", "filetype" },
    lualine_y = { "progress" },
    lualine_z = { "location" },
  },
  inactive_sections = {
    lualine_a = {},
    lualine_b = {},
    lualine_c = { { "filename", path = 1 } },
    lualine_x = { "location" },
    lualine_y = {},
    lualine_z = {},
  },
  tabline = {
    lualine_a = { { "buffers", show_filename_only = false } },
    lualine_x = {},
    lualine_y = {},
    lualine_z = { "tabs" },
  },
  extensions = {},
})

vim.cmd("colorscheme rose-pine")

[sjclayton]

@kdheepak

Couple quick questions...

1) Have you tried another colorscheme such as say Catppuccin? If so, does it also exhibit the same behavior in the tabline in lualine? ie. the tab that is inactive is getting that white separator character.

2) Does this only happen if you are on say the middle buffer out of 3, or like 2 out of 5? or does it happen on every single buffer no matter which is selected?

Because there is nothing in the way rose-pine configures the highlights for lualine that I can immediately see that would cause this to happen.

If you can provide a bit more information, it would greatly help in triaging this issue. Thanks! 😄

[kdheepak]

The issue doesn't occur with other colorschemes:

I narrowed the issue down to transparency:

require("rose-pine").setup({
  styles = {
    transparency = false, -- no issue
    -- transparency = true, -- issue occurs
  },
})

I'm not sure if that's an issue with lualine or this repo though

[sjclayton]

@kdheepak

Alrighty, I will look into it more later today when I get some time.

[mvllow]

I think #301 should fix this

[kdheepak]

I tested it out and it fixes it for me! Thanks for the responsive changes!