Error when starting debug session if fold is on the beggining of the file

[metalinspired]

Neovim version (nvim -v | head -n1)

NVIM v0.11.0-dev-1050+g45e319ade

Operating system/version

Kubuntu 24.04

How to reproduce the issue

When I start the debug session and the cursor is (and it is by default) on the beginning of the first line of the document which also contains a fold I get a error message.
Note that issue does not appear if I navigate from and back to same position.

Example to reproduce:

/*
* foo bar
*/
fn main() {
    let string = "Hüllo, world!\nHello, world!\nHello, world!";
    for l in string.lines() {
        println!("- {} -\n", l);
    }
    let end = string.chars().take(5).map(|c| c.len_utf8()).sum();
    println!("{} {}", &string[..end], end);
}

My config:

function()
      -- lsp->treesitter->indent
      local ftMap = {
        vim = 'indent',
        python = { 'indent' },
        git = '',
      }

      ---@param bufnr number
      ---@return Promise
      local function customizeSelector(bufnr)
        local function handleFallbackException(err, providerName)
          if type(err) == 'string' and err:match 'UfoFallbackException' then
            return require('ufo').getFolds(bufnr, providerName)
          else
            return require('promise').reject(err)
          end
        end

        return require('ufo')
          .getFolds(bufnr, 'lsp')
          :catch(function(err) return handleFallbackException(err, 'treesitter') end)
          :catch(function(err) return handleFallbackException(err, 'indent') end)
      end

      ---@type UfoConfig
      ---@diagnostic disable: missing-fields
      return {
        filetype_exclude = { 'help', 'alpha', 'dashboard', 'neo-tree', 'Trouble', 'lazy', 'mason' },
        provider_selector = function(_, filetype, _) return ftMap[filetype] or customizeSelector end,
        close_fold_kinds_for_ft = {
          default = { 'imports', 'comment' },
        },
        open_fold_hl_timeout = 800,
        fold_virt_text_handler = function(virtText, lnum, endLnum, width, truncate)
          local hlgroup = 'NonText'
          local newVirtText = {}
          local suffix = '   ' .. tostring(endLnum - lnum)
          local sufWidth = vim.fn.strdisplaywidth(suffix)
          local targetWidth = width - sufWidth
          local curWidth = 0
          for _, chunk in ipairs(virtText) do
            local chunkText = chunk[1]
            local chunkWidth = vim.fn.strdisplaywidth(chunkText)
            if targetWidth > curWidth + chunkWidth then
              table.insert(newVirtText, chunk)
            else
              chunkText = truncate(chunkText, targetWidth - curWidth)
              local hlGroup = chunk[2]
              table.insert(newVirtText, { chunkText, hlGroup })
              chunkWidth = vim.fn.strdisplaywidth(chunkText)
              if curWidth + chunkWidth < targetWidth then
                suffix = suffix .. (' '):rep(targetWidth - curWidth - chunkWidth)
              end
              break
            end
            curWidth = curWidth + chunkWidth
          end
          table.insert(newVirtText, { suffix, hlgroup })
          return newVirtText
        end,
      }
    end

Expected behavior

No error

Actual behavior

Error detected while processing OptionSet Autocommands for "buftype":
E5248: Invalid character in group name
Press ENTER or type command to continue

Error detected while processing OptionSet Autocommands for "buftype":
Error executing lua callback: ....local/share/nvim/lazy/nvim-ufo/lua/ufo/model/window.lua:56: E474: Invalid argument
stack traceback:
        [C]: in function '__newindex'
        ....local/share/nvim/lazy/nvim-ufo/lua/ufo/model/window.lua:56: in function 'removeListOption'
        ....local/share/nvim/lazy/nvim-ufo/lua/ufo/model/window.lua:150: in function 'clearCursorFoldedLineHighlight'
        ...oo/.local/share/nvim/lazy/nvim-ufo/lua/ufo/decorator.lua:159: in function 'resetCurosrFoldedLineHighlightByBuf'
        ...oo/.local/share/nvim/lazy/nvim-ufo/lua/ufo/decorator.lua:383: in function 'listener'
        ...oo/.local/share/nvim/lazy/nvim-ufo/lua/ufo/lib/event.lua:54: in function 'emit'
        ...n/.local/share/nvim/lazy/nvim-ufo/lua/ufo/bufmanager.lua:56: in function 'listener'
        ...oo/.local/share/nvim/lazy/nvim-ufo/lua/ufo/lib/event.lua:54: in function 'emit'
        ...e/foo/.local/share/nvim/lazy/nvim-ufo/lua/ufo/main.lua:67: in function <...e/foo/.local/share/nvim/lazy/nvim-ufo/lua/ufo/main.lua:51>
        [C]: in function 'resume'
        .../foo/.local/share/nvim/lazy/nvim-nio/lua/nio/tasks.lua:118: in function 'step'
        .../foo/.local/share/nvim/lazy/nvim-nio/lua/nio/tasks.lua:150: in function 'run'
        ...oo/.local/share/nvim/lazy/nvim-dap-ui/lua/dapui/init.lua:223: in function 'update_render'
        ...oo/.local/share/nvim/lazy/nvim-dap-ui/lua/dapui/init.lua:320: in function 'c'
        .../foo/.local/share/nvim/lazy/nvim-dap/lua/dap/session.lua:1060: in function <.../foo/.local/share/nvim/lazy/nvim-dap/lua/dap/session.lua:1048>

[kevinhwang91]

What's debug session?

[metalinspired]

Sorry for the wrong/different wording.
This is what I meant:

[kevinhwang91]

diff --git a/lua/ufo/model/window.lua b/lua/ufo/model/window.lua
index bb1b55b..0f9aec4 100644
--- a/lua/ufo/model/window.lua
+++ b/lua/ufo/model/window.lua
@@ -52,7 +52,9 @@ function Window:removeListOption(optionName, val)
     if not s then
         return
     end
+    vim.print('raw string:', o, 'raw bytes:', {o:byte(1, -1)})
     local v = o:sub(1, s - 1) .. o:sub(e + 1)
+    vim.print('sub bytes:', {v:byte(1, -1)})
     vim.wo[self.winid][optionName] = v
 end 

Please provide the msg after this patch.

[metalinspired]

• Before error message:

raw string:
CursorLine:UfoCursorFoldedLine,EndOfBuffer:DapUIEndOfBuffer,Normal:DapUINormal
raw bytes:
{ 67, 117, 114, 115, 111, 114, 76, 105, 110, 101, 58, 85, 102, 111, 67, 117, 114, 115, 111, 114, 70, 111, 108, 100, 101, 100, 76, 105, 110, 101, 44, 69, 110, 100, 79, 102, 66, 117, 102, 102,
101, 114, 58, 68, 97, 112, 85, 73, 69, 110, 100, 79, 102, 66, 117, 102, 102, 101, 114, 44, 78, 111, 114, 109, 97, 108, 58, 68, 97, 112, 85, 73, 78, 111, 114, 109, 97, 108 }
sub bytes:
{ 44, 69, 110, 100, 79, 102, 66, 117, 102, 102, 101, 114, 58, 68, 97, 112, 85, 73, 69, 110, 100, 79, 102, 66, 117, 102, 102, 101, 114, 44, 78, 111, 114, 109, 97, 108, 58, 68, 97, 112, 85, 73
, 78, 111, 114, 109, 97, 108 }

• After error mesage:

raw string:
CursorLine:UfoCursorFoldedLine
raw bytes:
{ 67, 117, 114, 115, 111, 114, 76, 105, 110, 101, 58, 85, 102, 111, 67, 117, 114, 115, 111, 114, 70, 111, 108, 100, 101, 100, 76, 105, 110, 101 }
sub bytes:
{}

[metalinspired]

@kevinhwang91 thank you for looking into the issue and I'm sorry to report that the issue is still present. I updated the plugin and I get the same exact error. Only thing that changed is line that is now 59 instead of 56.

[kevinhwang91]

Update the latest code, please.

[metalinspired]

Works like a charm. Thank you!