Attempt to get length of local 'prev_line' (a nil value)

[NULL]

Debug adapter definition and debug configuration

Hello, I am using nvim-dap with dap-ui to debug python.

I have configured the adapters, python used debugpy and c++ used cppdbg. Using shortcut keys can execute DAP commands smoothly, but entering repl window will cause problems. As long as I enter any content, this error prompt will appear, just like the picture showes.

Debug adapter version

debugpy: 1.6.0

Steps to Reproduce

The function of DAP can be used normally through shortcut keys, like toggle_breakpoint, continue,
Problems only occur when entering repl window.

Expected Result

Do not prompt error messages

Actual Result

[Mathias Fußenegger]

Are you by any chance connecting the REPL buffer to the LSP client? The error you're getting is from the LSP client.

If you're in the REPL buffer and run :lua =vim.lsp.buf_get_clients() what's the result?

(Also, the issue template is not just for decoration, please follow it next time)

[NULL]

If you're in the REPL buffer and run :lua =vim.lsp.buf_get_clients() what's the result?

Ha, here is the output of the command, I think it is actually connected to lsp.

{lua =vim.lsp.buf_get_clients()
  [2] = {
    _on_attach = <function 1>,
    attached_buffers = {
      [4] = true
    },
    cancel_request = <function 2>,
    commands = {},
    config = {
      autostart = true,
      cmd = { "node", "/home/forever/.local/share/nvim/site/pack/packer/opt/copilot.lua/copilot/index.js" },
      flags = {},
      get_language_id = <function 3>,
      name = "copilot",
      on_attach = <function 4>,
      on_init = <function 5>,
      root_dir = "/home/forever/Downloads",
      settings = {},
      trace = "messages"
    },
    handlers = {},
    id = 2,
    initialized = true,
    is_stopped = <function 6>,
    messages = {
      messages = {},
      name = "copilot",
      progress = {},
      status = {}
    },
    name = "copilot",
    notify = <function 7>,
    offset_encoding = "utf-16",
    request = <function 8>,
    request_sync = <function 9>,
    requests = {},
    rpc = {
     handle = <userdata 1>,
      notify = <function 10>,
      pid = 986431,
      request = <function 11>
    },
    server_capabilities = {
      textDocumentSync = {
        change = 2,
        openClose = true
      },
      workspace = {
        workspaceFolders = {
          changeNotifications = true,
          supported = true
        }
      }
    },
    stop = <function 12>,
    supports_method = <function 13>,
    workspaceFolders = <1>{ {
        name = "/home/forever/Downloads",
        uri = "file:///home/forever/Downloads"
      } },
    workspace_folders = <table 1>,
    <metatable> = {
      __index = <function 14>
    }
  }
}

[NULL]

It is caused by the plugin copilot, I commented copilot, all is ok.

thank you very much.

[Mathias Fußenegger]

Looks like it's related to zbirenbaum/copilot.lua#16

[NULL]

Yes, copilot.lua now has 'ft_disable' paramters, I think this problem can be avoided by adding 'dap-repl' to the parameters.
But I did not try it, because I have switched to compilot.vim

[Ilan Schemoul]

For the official github/copilot you do :
in a vimscript file (.vimrc for example)

let g:copilot_filetypes = {
      \ 'dap-repl': v:false,
      \ }

or in a .lua file

vim.api.nvim_set_var("copilot_filetypes", {
      ["dap-repl"] = false,
})