Corfu stopped showing auto complete for dart-mode

[Randy1Burrell]

I have a small issue that I would greatly appreciate help with. I have been using Corfu, Eglot, and https://github.com/amake/flutter.el to develop for about 4 weeks now, and everything worked fine. However, last week while writing code, Corfu stopped showing autocompletion for dart/flutter regardless of what I tried. Here is my config relating to Flutter Corfu and Eglot. Corfu still shows auto-completion for all the other languages I develop in, so this points to me believing the issue might be with dart mode.

Here is my config:

(setq tab-always-indent 'complete)
(when (maybe-require-package 'orderless)
  (with-eval-after-load 'vertico
    (require 'orderless)
    (setq completion-styles '(orderless basic))))
(setq completion-category-defaults nil
      completion-category-overrides nil)
(setq completion-cycle-threshold 4)

(when (maybe-require-package 'corfu)
  (setq-default corfu-auto t)
  (with-eval-after-load 'eshell
    (add-hook 'eshell-mode-hook (lambda () (setq-local corfu-auto nil))))
  (setq-default corfu-quit-no-match 'separator)
  (add-hook 'after-init-hook 'global-corfu-mode)

  (with-eval-after-load 'corfu
    (corfu-popupinfo-mode))

  ;; Make Corfu also work in terminals, without disturbing usual behaviour in GUI
  (when (maybe-require-package 'corfu-terminal)
    (with-eval-after-load 'corfu
      (corfu-terminal-mode)))
  )

(use-package svg-lib)
(use-package kind-icon
  :ensure t
  :after corfu
  :custom
  (kind-icon-blend-background t)
  (kind-icon-default-face 'corfu-default) ; only needed with blend-background
  :config
  (add-to-list 'corfu-margin-formatters #'kind-icon-margin-formatter))

(when (maybe-require-package 'eglot)
  (maybe-require-package 'consult-eglot))

(with-eval-after-load 'eglot
  (add-to-list 'eglot-server-programs '((web-mode) . ("typescript-language-server")))
  (add-to-list 'eglot-server-programs '((rust-mode rust-ts-mode) . ("rust-analyzer"))))

(dolist (mode '(bash-ts-mode-hook
                c-mode-hook
                css-mode-hook
                css-ts-mode-hook
                closure-ts-mode-hook
                dart-mode-hook
                dockerfile-mode-hook
                js-mode-hook
                js-ts-mode-hook
                less-css-mode-hook
                php-mode-hook
                python-mode-hook
                python-ts-mode-hook
                prisma-ts-mode-hook
                ruby-mode-hook
                ruby-ts-mode-hook
                rust-mode-hook
                go-mode-hook
                go-ts-mode-hook
                rust-ts-mode-hook
                sass-mode-hook
                scss-mode-hook
                terraform-mode-hook
                typescript-mode-hook
                tsx-ts-mode-hook
                ts-mode-hook
                yaml-mode-hook
                c++-mode-hook))
  (add-hook mode 'eglot-ensure))

;; Assuming usage with dart-mode
(use-package dart-mode
  ;; Optional
  :hook (dart-mode . flutter-test-mode))

(use-package flutter
  :after dart-mode
  :bind (:map dart-mode-map
              ("C-M-x" . #'flutter-run-or-hot-reload))
  :custom
  (flutter-sdk-path "/opt/homebrew/bin/flutter"))

(reformatter-define dart-format
  :program "dart"
  :args '("format"))

(add-to-list 'eglot-server-programs '(dart-mode . ("dart" "language-server")))

(with-eval-after-load "dart-mode"
  (define-key dart-mode-map (kbd "C-c C-o") 'dart-format-buffer))

(add-hook 'dart-mode-hook (lambda () (add-hook 'after-save-hook 'dart-format-buffer nil t)))
(add-hook 'flutter-test-mode-hook (lambda () (add-hook 'after-save-hook #'flutter-run-or-hot-reload nil t)))
(add-hook 'flutter-mode-hook (lambda () (add-hook 'after-save-hook #'flutter-run-or-hot-reload nil t)))

Contents of Dart file:

import 'package:flutter/material.dart';
import 'package:sqflite/sqflite.dart';
import 'state/app_state.dart';
import 'widgets/map.dart';
import 'package:provider/provider.dart';
import 'widgets/home_app_bar.dart';
import 'package:get/get.dart';
import 'package:flutter_background_geolocation/flutter_background_geolocation.dart'
    as bg;
import 'dart:io';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of Loadaman.
  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.black),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Loadaman'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  // Controls the bottom navigator
  int _selectedIndex = 0;

  void _onItemTapped(int index) {
    setState(() {
      _selectedIndex = index;
    });
  }

  static const List<Widget> _pages = <Widget>[
    MapWidget(),
    Center(
      child: Text('Services'),
    ),
    Center(
      child: Text('Activity'),
    ),
    Center(
      child: Text('Account'),
    ),
  ];

  @override
  void initState() {
    super.initState();

    var db = openDatabase('loadaman', version: 1, onOpen: (Database db) async {
      print('Database version: ${await db.getVersion()}');
    }, onCreate: (Database db, int version) async {
      await db.execute(
          'CREATE TABLE location(id INTEGER PRIMARY KEY, lattitude REAL, longitude REAL)');
    });
  }

  @override
  Widget build(BuildContext context) {
    final ThemeData theme = Theme.of(context);
    return ChangeNotifierProvider<AppState>(
      create: (context) => AppState(),
      child: SafeArea(
        child: Scaffold(
          appBar: HomeAppBar(
            title: widget.title,
          ),
          body: _pages.elementAt(_selectedIndex),
          bottomNavigationBar: BottomNavigationBar(
            items: <BottomNavigationBarItem>[
              BottomNavigationBarItem(
                backgroundColor: theme.iconTheme.color,
                icon: const Icon(Icons.home),
                label: 'Home',
              ),
              BottomNavigationBarItem(
                backgroundColor: theme.iconTheme.color,
                icon: const Icon(Icons.apps),
                label: 'Services',
              ),
              BottomNavigationBarItem(
                backgroundColor: theme.iconTheme.color,
                icon: const Icon(Icons.newspaper),
                label: 'Activities',
              ),
              BottomNavigationBarItem(
                backgroundColor: theme.iconTheme.color,
                icon: const Icon(Icons.person),
                label: 'Account',
              ),
            ],
            backgroundColor: theme.iconTheme.color,
            selectedItemColor: Colors.amberAccent,
            selectedIconTheme: const IconThemeData(color: Colors.amberAccent),
            currentIndex: _selectedIndex,
            onTap: _onItemTapped,
            enableFeedback: true,
          ),
        ),
      ),
    );
  }
}

Here's an error log I got once when trying to debug this issue:

Debugger entered--Lisp error: (jsonrpc-error "request id=64 failed:" (jsonrpc-error-message . "Timed out"))
  signal(jsonrpc-error ("request id=64 failed:" (jsonrpc-error-message . "Timed out")))
  #<subr jsonrpc-request>(#<eglot-lsp-server eglot-lsp-server-4d0d2768> :textDocument/completion (:textDocument (:uri "file:///Users/randyburrell/Projects/Work/Randy/Loa...") :position (:line 10 :character 4) :context (:triggerKind 1)) :deferred :textDocument/completion :cancel-on-input t)
  apply(#<subr jsonrpc-request> (#<eglot-lsp-server eglot-lsp-server-4d0d2768> :textDocument/completion (:textDocument (:uri "file:///Users/randyburrell/Projects/Work/Randy/Loa...") :position (:line 10 :character 4) :context (:triggerKind 1)) :deferred :textDocument/completion :cancel-on-input t))
  jsonrpc-request(#<eglot-lsp-server eglot-lsp-server-4d0d2768> :textDocument/completion (:textDocument (:uri "file:///Users/randyburrell/Projects/Work/Randy/Loa...") :position (:line 10 :character 4) :context (:triggerKind 1)) :deferred :textDocument/completion :cancel-on-input t)
  #f(compiled-function () #<bytecode 0x1d97b3477f652e0e>)()
  #f(compiled-function (probe pred action) #<bytecode 0xb16bffce9dc675a>)("" nil t)
  completion-pcm--all-completions("" (prefix "i" any "m" any "p" any "o") #f(compiled-function (probe pred action) #<bytecode 0xb16bffce9dc675a>) nil)
  completion-substring--all-completions("impo" #f(compiled-function (probe pred action) #<bytecode 0xb16bffce9dc675a>) nil 4 completion-flex--make-flex-pattern)
  #<subr completion-flex-all-completions>("impo" #f(compiled-function (probe pred action) #<bytecode 0xb16bffce9dc675a>) nil 4)
  apply(#<subr completion-flex-all-completions> ("impo" #f(compiled-function (probe pred action) #<bytecode 0xb16bffce9dc675a>) nil 4))
  completion-flex-all-completions("impo" #f(compiled-function (probe pred action) #<bytecode 0xb16bffce9dc675a>) nil 4)
  #f(compiled-function (style) #<bytecode -0x18c96571742c93bf>)(flex)
  completion--some(#f(compiled-function (style) #<bytecode -0x18c96571742c93bf>) (flex basic orderless))
  completion--nth-completion(2 "impo" #f(compiled-function (probe pred action) #<bytecode 0xb16bffce9dc675a>) nil 4 (metadata (category . eglot) (display-sort-function . #<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_151>)))
  #<subr completion-all-completions>("impo" #f(compiled-function (probe pred action) #<bytecode 0xb16bffce9dc675a>) nil 4 (metadata (category . eglot) (display-sort-function . #<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_151>)))
  apply(#<subr completion-all-completions> ("impo" #f(compiled-function (probe pred action) #<bytecode 0xb16bffce9dc675a>) nil 4 (metadata (category . eglot) (display-sort-function . #<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_151>))))
  completion-all-completions("impo" #f(compiled-function (probe pred action) #<bytecode 0xb16bffce9dc675a>) nil 4 (metadata (category . eglot) (display-sort-function . #<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_151>)))
  corfu--filter-completions("impo" #f(compiled-function (probe pred action) #<bytecode 0xb16bffce9dc675a>) nil 4 (metadata (category . eglot) (display-sort-function . #<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_151>)))
  corfu--recompute("impo" 4 #f(compiled-function (probe pred action) #<bytecode 0xb16bffce9dc675a>) nil)
  corfu--update(interruptible)
  #f(compiled-function (&optional auto) #<bytecode 0x1d4c8c548ab2ea4c>)(auto)
  apply(#f(compiled-function (&optional auto) #<bytecode 0x1d4c8c548ab2ea4c>) auto)
  #f(compiled-function (&rest args) #<bytecode -0x11808fa36a21efe5>)(auto)
  apply(#f(compiled-function (&rest args) #<bytecode -0x11808fa36a21efe5>) auto)
  corfu--exhibit(auto)
  corfu--auto-complete-deferred((#<window 2073 on main.dart> #<buffer main.dart> 1734 363))
  apply(corfu--auto-complete-deferred (#<window 2073 on main.dart> #<buffer main.dart> 1734 363))
  timer-event-handler([t 26199 11817 483055 nil corfu--auto-complete-deferred ((#<window 2073 on main.dart> #<buffer main.dart> 1734 363)) nil 0 nil])
  sit-for(3)
  flyspell-check-word-p()
  flyspell-post-command-hook()

Could you point me in the right direction to solve this issue?

[Randy1Burrell]

I have also checked flymake-logs and found these

 ■  Warning [flymake *scratch*]: Disabling backend flymake-proc-legacy-flymake because (error Can’t find a suitable init function)
 ■  Warning [elisp-mode *scratch*]: byte-compile process elisp-flymake-byte-compile obsolete
⛔ Warning [flymake *scratch* (Mobile-Flutter)]: Disabling backend flymake-proc-legacy-flymake because (error Can’t find a suitable init function)
⛔ Warning [flymake main.dart]: Disabling backend flymake-proc-legacy-flymake because (error Can’t find a suitable init function)
⛔ Warning [flymake *scratch* (.emacs.d)]: Disabling backend flymake-proc-legacy-flymake because (error Can’t find a suitable init function)
⛔ Warning [flymake README.md]: Disabling backend flymake-proc-legacy-flymake because (error Can’t find a suitable init function)
⛔ Warning [flymake *scratch* (dotfiles)]: Disabling backend flymake-proc-legacy-flymake because (error Can’t find a suitable init function)
⛔ Warning [flymake README.org]: Disabling backend flymake-proc-legacy-flymake because (error Can’t find a suitable init function)
⛔ Warning [flymake README.org • configs]: Disabling backend flymake-proc-legacy-flymake because (error Can’t find a suitable init function)
⛔ Warning [flymake *Org Src README.org • configs[ emacs-lisp ]*]: Disabling backend flymake-proc-legacy-flymake because (error Can’t find a suitable init function)