在我的 flutter 应用程序的 gradle 构建期间出现一个超级奇怪的错误

Question

当我尝试运行我的 flutter 应用程序时，这是我遇到的错误。 我尝试检查到最后一次提交（应用程序在我最后一次提交时完美运行），但这并没有帮助。 我尝试使用 flutter clean 清理缓存并使用 flutter pub get 重新安装所有软件包。 没用。 尝试使用 gradlew clean 清理构建文件夹并尝试运行 gradlew build。 但它仍然给出了同样的错误。 我应该如何调试这个？

../../flutter/packages/flutter/lib/src/widgets/framework.dart:1072:60: Error: Can't find '}' to match '{'.
      if (_debugLifecycleState == _StateLifecycle.defunct) {
                                                           ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1071:15: Error: Can't find '}' to match '{'.
    assert(() {
              ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1096:7: Error: Expected a class member, but got 'if'.
      if (_debugLifecycleState == _StateLifecycle.created && !mounted) {
      ^^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1096:10: Error: Expected an identifier, but got '('.
Try inserting an identifier before '('.
      if (_debugLifecycleState == _StateLifecycle.created && !mounted) {
         ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1096:32: Error: Expected ')' before this.
      if (_debugLifecycleState == _StateLifecycle.created && !mounted) {
                               ^^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1107:7: Error: Expected a class member, but got 'return'.
      return true;
      ^^^^^^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1107:14: Error: Expected a class member, but got 'true'.
      return true;
             ^^^^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1107:18: Error: Expected a class member, but got ';'.
      return true;
                 ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1108:6: Error: Expected a declaration, but got '('.
    }());
     ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1108:7: Error: Expected a declaration, but got ')'.
    }());
      ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1108:8: Error: Expected a declaration, but got ')'.
    }());
       ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1108:9: Error: Unexpected token ';'.
    }());
        ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1110:5: Error: 'assert' can't be used as an identifier because it's a keyword.
Try renaming this to be an identifier that isn't a keyword.
    assert(() {
    ^^^^^^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1110:12: Error: Expected an identifier, but got '('.
Try inserting an identifier before '('.
    assert(() {
           ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1110:15: Error: Expected ')' before this.
    assert(() {
              ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1128:9: Error: Expected a function body or '=>'.
Try adding {}.
    }());
        ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1129:13: Error: Unexpected token '!'.
    _element!.markNeedsBuild();
            ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1129:5: Error: A function declaration needs an explicit list of parameters.
Try adding a parameter list to the function declaration.
    _element!.markNeedsBuild();
    ^^^^^^^^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1129:14: Error: Expected '{' before this.
    _element!.markNeedsBuild();
             ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1129:14: Error: Expected a declaration, but got '.'.
    _element!.markNeedsBuild();
             ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1129:31: Error: Expected a function body or '=>'.
Try adding {}.
    _element!.markNeedsBuild();
                              ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1130:3: Error: Expected a declaration, but got '}'.
  }
  ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1329:37: Error: Expected a function body or '=>'.
Try adding {}.
  Widget build(BuildContext context);
                                    ^
../../flutter/packages/flutter/lib/src/widgets/framework.dart:1359:1: Error: Expected a declaration, but got '}'.
}
^
../../flutter/packages/flutter/lib/src/material/app_bar.dart:787:11: Error: Superclass has no method named 'didChangeDependencies'.
    super.didChangeDependencies();
          ^^^^^^^^^^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/material/app_bar.dart:801:11: Error: Superclass has no method named 'dispose'.
    super.dispose();
          ^^^^^^^
../../flutter/packages/flutter/lib/src/material/banner.dart:243:11: Error: Superclass has no method named 'dispose'.
    super.dispose();
          ^^^^^^^
../../flutter/packages/flutter/lib/src/material/bottom_app_bar.dart:125:11: Error: Superclass has no method named 'didChangeDependencies'.
    super.didChangeDependencies();
          ^^^^^^^^^^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/material/calendar_date_picker.dart:184:11: Error: Superclass has no method named 'didChangeDependencies'.
    super.didChangeDependencies();
          ^^^^^^^^^^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/material/calendar_date_picker.dart:522:11: Error: Superclass has no method named 'didChangeDependencies'.
    super.didChangeDependencies();
          ^^^^^^^^^^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/material/calendar_date_picker.dart:542:11: Error: Superclass has no method named 'dispose'.
    super.dispose();
          ^^^^^^^
../../flutter/packages/flutter/lib/src/material/calendar_date_picker.dart:889:11: Error: Superclass has no method named 'didChangeDependencies'.
    super.didChangeDependencies();
          ^^^^^^^^^^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/material/calendar_date_picker.dart:902:11: Error: Superclass has no method named 'dispose'.
    super.dispose();
          ^^^^^^^
../../flutter/packages/flutter/lib/src/material/date_picker.dart:1680:11: Error: Superclass has no method named 'dispose'.
    super.dispose();
          ^^^^^^^
../../flutter/packages/flutter/lib/src/material/date_picker.dart:1843:11: Error: Superclass has no method named 'dispose'.
    super.dispose();
          ^^^^^^^
../../flutter/packages/flutter/lib/src/material/date_picker.dart:2224:11: Error: Superclass has no method named 'didChangeDependencies'.
    super.didChangeDependencies();
          ^^^^^^^^^^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/material/date_picker.dart:2237:11: Error: Superclass has no method named 'dispose'.
    super.dispose();
          ^^^^^^^
../../flutter/packages/flutter/lib/src/material/date_picker.dart:2804:11: Error: Superclass has no method named 'dispose'.
    super.dispose();
          ^^^^^^^
../../flutter/packages/flutter/lib/src/material/date_picker.dart:2809:11: Error: Superclass has no method named 'didChangeDependencies'.
    super.didChangeDependencies();
          ^^^^^^^^^^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/material/desktop_text_selection.dart:143:11: Error: Superclass has no method named 'dispose'.
    super.dispose();
          ^^^^^^^
../../flutter/packages/flutter/lib/src/material/drawer.dart:370:11: Error: Superclass has no method named 'didChangeDependencies'.
    super.didChangeDependencies();
          ^^^^^^^^^^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/material/dropdown.dart:1209:11: Error: Superclass has no method named 'dispose'.
    super.dispose();
          ^^^^^^^
../../flutter/packages/flutter/lib/src/material/expansion_tile.dart:419:11: Error: Superclass has no method named 'didChangeDependencies'.
    super.didChangeDependencies();
          ^^^^^^^^^^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/material/ink_decoration.dart:277:11: Error: Superclass has no method named 'deactivate'.
    super.deactivate();
          ^^^^^^^^^^
../../flutter/packages/flutter/lib/src/material/ink_well.dart:805:11: Error: Superclass has no method named 'dispose'.
    super.dispose();
          ^^^^^^^
../../flutter/packages/flutter/lib/src/material/input_date_picker_form_field.dart:156:11: Error: Superclass has no method named 'dispose'.
    super.dispose();
          ^^^^^^^
../../flutter/packages/flutter/lib/src/material/input_date_picker_form_field.dart:161:11: Error: Superclass has no method named 'didChangeDependencies'.
    super.didChangeDependencies();
          ^^^^^^^^^^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/material/input_decorator.dart:1856:11: Error: Superclass has no method named 'didChangeDependencies'.
    super.didChangeDependencies();
          ^^^^^^^^^^^^^^^^^^^^^

Answer 1

解决了。 发生这种情况是因为我在分析错误时不小心从 Flutter 的源代码中删除了一行。