* 겪고 있는 문제 상황을 최대한 자세하게 작성해주세요.

* 문제 해결을 위해 어떤 시도를 해보았는지 구체적으로 함께 알려주세요.

강의 복습을 하려고 하는데 예전에는 잘 됐는데 갑자기 런 디버깅이 되질 않아

Launching lib\main.dart on Android SDK built for x86 in debug mode...
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:182:9: Error: Expected '.' before this.
    this.1actions,
        ^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:182:9: Error: Expected an identifier, but got '.1'.
Try inserting an identifier before '.1'.
    this.1actions,
        ^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:182:9: Error: Expected '}' before this.


    this.1actions,
        ^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:208:15: Error: Can't access 'this' in a field initializer to read 'elevation'.
  }) : assert(elevation == null || elevation >= 0.0),
              ^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:208:36: Error: Can't access 'this' in a field initializer to read 'elevation'.
  }) : assert(elevation == null || elevation >= 0.0),
                                   ^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:209:60: Error: Can't access 'this' in a field initializer to read 'bottom'.
       preferredSize = _PreferredAppBarSize(toolbarHeight, bottom?.preferredSize.height);
                                                           ^^^^^^


/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:209:45: Error: Can't access 'this' in a field initializer to read 'toolbarHeight'.
       preferredSize = _PreferredAppBarSize(toolbarHeight, bottom?.preferredSize.height);
                                            ^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:1269:9: Error: No named parameter with the name 'clipBehavior'.
        clipBehavior: clipBehavior,


        ^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:177:3: Context: Found this candidate, but the arguments don't match.
  AppBar({
  ^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:270:17: Error: Final field 'leading' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final Widget? leading;
                ^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:279:14: Error: Final field 'automaticallyImplyLeading' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final bool automaticallyImplyLeading;


             ^^^^^^^^^^^^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:315:17: Error: Final field 'title' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final Widget? title;
                ^^^^^


/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:357:23: Error: Final field 'actions' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final List<Widget>? actions;
                      ^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:369:17: Error: Final field 'flexibleSpace' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final Widget? flexibleSpace;
                ^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:381:30: Error: Final field 'bottom' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final PreferredSizeWidget? bottom;
                             ^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:409:17: Error: Final field 'elevation' is not initialized.


Try to initialize the field in the declaration or in every constructor.
  final double? elevation;
                ^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:431:17: Error: Final field 'scrolledUnderElevation' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final double? scrolledUnderElevation;
                ^^^^^^^^^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:438:37: Error: Final field 'notificationPredicate' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final ScrollNotificationPredicate notificationPredicate;
                                    ^^^^^^^^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:452:16: Error: Final field 'shadowColor' is not initialized.
Try to initialize the field in the declaration or in every constructor.


  final Color? shadowColor;
               ^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:463:16: Error: Final field 'surfaceTintColor' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final Color? surfaceTintColor;
               ^^^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:481:22: Error: Final field 'shape' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final ShapeBorder? shape;
                     ^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:506:16: Error: Final field 'backgroundColor' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final Color? backgroundColor;
               ^^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:531:16: Error: Final field 'foregroundColor' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final Color? foregroundColor;
               ^^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:545:24: Error: Final field 'iconTheme' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final IconThemeData? iconTheme;
                       ^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:563:24: Error: Final field 'actionsIconTheme' is not initialized.
Try to initialize the field in the declaration or in every constructor.


  final IconThemeData? actionsIconTheme;
                       ^^^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:572:14: Error: Final field 'primary' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final bool primary;
             ^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:581:15: Error: Final field 'centerTitle' is not initialized.
Try to initialize the field in the declaration or in every constructor.


  final bool? centerTitle;
              ^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:588:14: Error: Final field 'excludeHeaderSemantics' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final bool excludeHeaderSemantics;
             ^^^^^^^^^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:599:17: Error: Final field 'titleSpacing' is not initialized.
Try to initialize the field in the declaration or in every constructor.


  final double? titleSpacing;
                ^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:610:16: Error: Final field 'toolbarOpacity' is not initialized.


Try to initialize the field in the declaration or in every constructor.
  final double toolbarOpacity;
               ^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:621:16: Error: Final field 'bottomOpacity' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final double bottomOpacity;
               ^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:637:17: Error: Final field 'toolbarHeight' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final double? toolbarHeight;
                ^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:644:17: Error: Final field 'leadingWidth' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final double? leadingWidth;
                ^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:661:20: Error: Final field 'toolbarTextStyle' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final TextStyle? toolbarTextStyle;


                   ^^^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:679:20: Error: Final field 'titleTextStyle' is not initialized.


Try to initialize the field in the declaration or in every constructor.
  final TextStyle? titleTextStyle;
                   ^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:701:31: Error: Final field 'systemOverlayStyle' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final SystemUiOverlayStyle? systemOverlayStyle;
                              ^^^^^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:716:14: Error: Final field 'forceMaterialTransparency' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final bool forceMaterialTransparency;
             ^^^^^^^^^^^^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:719:15: Error: Final field 'clipBehavior' is not initialized.
Try to initialize the field in the declaration or in every constructor.
  final Clip? clipBehavior;
              ^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/search.dart:577:13: Error: No named parameter with the name 'leading'.
            leading: widget.delegate.buildLeading(context),
            ^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:177:3: Context: Found this candidate, but the arguments don't match.
  AppBar({
  ^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/date_picker.dart:1570:11: Error: No named parameter with the name 'iconTheme'.
          iconTheme: iconTheme,
          ^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:177:3: Context: Found this candidate, but the arguments don't match.
  AppBar({
  ^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/about.dart:872:11: Error: No named parameter with the name 'title'.
          title: _PackageLicensePageTitle(
          ^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:177:3: Context: Found this candidate, but the arguments don't match.
  AppBar({
  ^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/about.dart:1297:9: Error: No named parameter with the name 'title'.
        title: title,
        ^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:177:3: Context: Found this candidate, but the arguments don't match.
  AppBar({


  ^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/about.dart:1385:13: Error: No named parameter with the name 'title'.
            title: widget.title,
            ^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:177:3: Context: Found this candidate, but the arguments don't match.
  AppBar({
  ^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/about.dart:1459:17: Error: No named parameter with the name 'title'.


                title: widget.title,
                ^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/app_bar.dart:177:3: Context: Found this candidate, but the arguments don't match.
  AppBar({
  ^^^^^^


Target kernel_snapshot failed: Exception


FAILURE: Build failed with an exception.


* Where:
Script 'C:\src\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1201
* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'C:\src\flutter\bin\flutter.bat'' finished with non-zero exit value 1
* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.


* Get more help at https://help.gradle.org


BUILD FAILED in 4s
Exception: Gradle task assembleDebug failed with exit code 1
Exited (sigterm)