completion on the whitescope with copliot-cmp result in a broken experience

[kulabun]

FAQ

• I have checked the FAQ and it didn't resolve my problem.

Announcement

• I have checked Breaking change announcement.

Minimal reproducible full config

if has('vim_starting')
  set encoding=utf-8
endif
scriptencoding utf-8

if &compatible
  set nocompatible
endif

let s:plug_dir = expand('/tmp/plugged/vim-plug')
if !filereadable(s:plug_dir .. '/plug.vim')
  execute printf('!curl -fLo %s/autoload/plug.vim --create-dirs https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim', s:plug_dir)
end

execute 'set runtimepath+=' . s:plug_dir
call plug#begin(s:plug_dir)
Plug 'hrsh7th/nvim-cmp'
Plug 'zbirenbaum/copilot.lua'
Plug 'zbirenbaum/copilot-cmp'
Plug 'neovim/nvim-lspconfig'
call plug#end()
PlugInstall | quit

" vim.cmd([[set completeopt=menu,menuone,noselect]])

" Setup global configuration. More on configuration below.
lua << EOF
  local cmp = require "cmp"
  cmp.setup {
    mapping = {
      ['<CR>'] = cmp.mapping.confirm({ select = true, behavior = cmp.ConfirmBehavior.Replace })
    },

    sources = cmp.config.sources({
      { name = "copilot" },
    }),
  }
EOF

lua << EOF
  local copilot = require "copilot"
  copilot.setup({
    suggestion = { enabled = false },
    panel = { enabled = false },
  })
  local copilot_cmp = require "copilot_cmp"
  copilot_cmp.setup({})
EOF

Description

When copilot is used in the beginnig of the line after indentation, resulted completion is a not what expected. It looks broken.

It looks like this is happening because of whitespace handling in cmp and '.' keyword pattern that can trigger completion on the whitespace.

Steps to reproduce

write some comment or class statement in the first line. Move cursor to the second line add two whitespaces / tabs.

Expected behavior

You get completion you accepted.

Actual behavior

some part of the completion is duplicated in the beginning of the inserted text.

Additional context

No response

[hrsh7th]

Thank you. I'll check your PR and the issue.

[CharlesARoy]

This sounds like an issue I'm having that I described over on the copilot-cmp page. For me, it hasn't been fixed yet.