17
votes

I am getting the following error run project in my vscode debug console after flutter upgrade v3.13:

Invalid depfile: C:\Users\DIMAS\FlutterCode\skip\.dart_tool\flutter_build\35269fa8986c9ee7a9c97697217003ec\kernel_snapshot.d
Invalid depfile: C:\Users\DIMAS\FlutterCode\skip\.dart_tool\flutter_build\35269fa8986c9ee7a9c97697217003ec\kernel_snapshot.d
Error: Could not resolve the package 'characters' in 'package:characters/characters.dart'.
/C:/src/flutter/packages/flutter/lib/src/material/text_field.dart:9:8: Error: Not found: 'package:characters/characters.dart'
import 'package:characters/characters.dart';
       ^
/C:/src/flutter/packages/flutter/lib/widgets.dart:18:1: Error: Not found: 'package:characters/characters.dart'
export 'package:characters/characters.dart';
^
/C:/src/flutter/packages/flutter/lib/src/rendering/editable.dart:10:8: Error: Not found: 'package:characters/characters.dart'
import 'package:characters/characters.dart';
       ^
/C:/src/flutter/packages/flutter/lib/src/services/text_formatter.dart:9:8: Error: Not found: 'package:characters/characters.dart'
import 'package:characters/characters.dart';
       ^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:88:26: Error: Type 'DiagnosticableMixin' not found.
class PictureStream with DiagnosticableMixin {
                         ^^^^^^^^^^^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:192:44: Error: Type 'DiagnosticableMixin' not found.
abstract class PictureStreamCompleter with DiagnosticableMixin {
                                           ^^^^^^^^^^^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:88:7: Error: The type 'DiagnosticableMixin' can't be mixed in.
class PictureStream with DiagnosticableMixin {
      ^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:192:16: Error: The type 'DiagnosticableMixin' can't be mixed in.
abstract class PictureStreamCompleter with DiagnosticableMixin {
               ^
/C:/src/flutter/packages/flutter/lib/src/material/text_field.dart:822:61: Error: The getter 'characters' isn't defined for the class 'String'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'.
  int get _currentLength => _effectiveController.value.text.characters.length;
                                                            ^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/material/text_field.dart:824:118: Error: The getter 'characters' isn't defined for the class 'String'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'.
  bool get _hasIntrinsicError => widget.maxLength != null && widget.maxLength > 0 && _effectiveController.value.text.characters.length > widget.maxLength;
                                                                                                                     ^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/rendering/editable.dart:244:64: Error: The getter 'characters' isn't defined for the class 'String'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'.
       assert(obscuringCharacter != null && obscuringCharacter.characters.length == 1),
                                                               ^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/rendering/editable.dart:361:35: Error: The getter 'characters' isn't defined for the class 'String'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'.
    assert(value != null && value.characters.length == 1);
                                  ^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/rendering/editable.dart:567:11: Error: 'Characters' isn't a type.
    final Characters remaining = string.characters.skipWhile((String currentString) {
          ^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/rendering/editable.dart:567:41: Error: The getter 'characters' isn't defined for the class 'String'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'.
    final Characters remaining = string.characters.skipWhile((String currentString) {
                                        ^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/rendering/editable.dart:600:47: Error: The getter 'characters' isn't defined for the class 'String'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'.
    for (final String currentString in string.characters) {
                                              ^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/rendering/editable.dart:602:40: Error: The getter 'characters' isn't defined for the class 'String'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'.
          !_isWhitespace(currentString.characters.first.toString().codeUnitAt(0))) {
                                       ^^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:167:11: Error: Superclass has no method named 'debugFillProperties'.
    super.debugFillProperties(properties);
          ^^^^^^^^^^^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:171:30: Error: The method 'toStringShort' isn't defined for the class 'PictureStreamCompleter'.
 - 'PictureStreamCompleter' is from 'package:flutter_svg/src/picture_stream.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart').
Try correcting the name to the name of an existing method, or defining a method named 'toStringShort'.
      ifPresent: _completer?.toStringShort(),
                             ^^^^^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:266:11: Error: Superclass has no method named 'debugFillProperties'.
    super.debugFillProperties(description);
          ^^^^^^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/services/text_formatter.dart:355:11: Error: 'CharacterRange' isn't a type.
    final CharacterRange iterator = CharacterRange(value.text);
          ^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/services/text_formatter.dart:355:37: Error: Method not found: 'CharacterRange'.
    final CharacterRange iterator = CharacterRange(value.text);
                                    ^^^^^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/services/text_formatter.dart:356:20: Error: The getter 'characters' isn't defined for the class 'String'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'.
    if (value.text.characters.length > maxLength) {
                   ^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/services/text_formatter.dart:375:61: Error: The getter 'characters' isn't defined for the class 'String'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'.
    if (maxLength != null && maxLength > 0 && newValue.text.characters.length > maxLength) {
                                                            ^^^^^^^^^^
/C:/src/flutter/packages/flutter/lib/src/services/text_formatter.dart:378:25: Error: The getter 'characters' isn't defined for the class 'String'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'.
      if (oldValue.text.characters.length == maxLength) {
                        ^^^^^^^^^^

Unhandled exception:
FileSystemException(uri=org-dartlang-untransla
table-uri:package%3Acharacters%2Fcharacters.dart; message=StandardFileSystem only supports file:* and data:* URIs)
[38;5;248m#0      StandardFileSystem.entityForUri  (package:front_end/src/api_prototype/standard_file_system.dart:33:7)[39;49m

[38;5;248m#1      asFileUri  (package:vm/kernel_front_end.dart:659:37)[39;49m
[38;5;248m#2      writeDepfile  (package:vm/kernel_front_end.dart:853:21)[39;49m
<asynchronous suspen
sion>
[38;5;248m#3      FrontendCompiler.compile  (package:frontend_server/frontend_server.dart:574:15)[39;49m
[38;5;244m<asynchronous suspension>[39;49m
#4      _FlutterFrontendCompiler.compile (packa
ge:flutter_frontend_server/server.dart:43:22)
[38;5;248m#5      starter  (package:flutter_frontend_server/server.dart:182:27)[39;49m

#6      main (file:///C:/b/s/w/ir/cache/builder/src/flut
ter/flutter_frontend_server/bin/starter.dart:9:30)
[38;5;244m#7      _startIsolate.<anonymous closure>  (dart:isolate-patch/isolate_patch.dart:299:32)[39;49m
#8      _RawReceivePortImpl
._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)

FAILURE: Build failed with an exception.

  • Where: Script 'C:\src\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 896

  • 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 57s Exception: Gradle task assembleDebug failed with exit code 1

its seems missing character.dart and some gradle stuff, but i couldn't find exact problem and answer for now on google,

But if i make and run a new project it doesn't have any error, herewith my pubspec.yaml (i've compared old & new project pubspec.yaml there is no significant different exept for additional package): enter image description here

7

7 Answers

17
votes

It looks like you’re missing characters package in your pubspec.yaml.

Make sure it is there and your pubspec is formatted properly. And run flutter pub get again.

If this fails, you should run flutter pub cache repair

7
votes

Had the same issue.

In pubspec.yaml just execute flutter pub get and flutter pub upgrade.

Then in the root directory terminal execute flutter clean and it will run without problems.

4
votes

I have had similar issue on my flutter application after I updated the flutter SDK.

What solved my issue were to do the following.

Open a terminal (CMD) navigate to your flutter project, where the pubspec.yaml is. Run the following commands:

Solution

flutter pub get

flutter pub upgrade

After that if you still have issues you can run the flutter pub cache repair, however the

flutter clean

did the trick for me and fixed the issue.

I restarted both visual studio and the AVD virtual device, to be sure to have a fresh restart.

What tools and software I use:

Visual Studio Code 1.47.3

Android Studio 4.0.1 (Android Virtual Device)

Flutter 1.20.1 (Release date 6.8.2020)

Dart 2.9.0

2
votes

after refresh the flutter pub get, i've had error SVG problem and i update flutter_svg: ^0.17.4 to flutter_svg: ^0.18.0 it solved SVG problem,

2
votes

I've ran into this issue a couple times after running flutter upgrade on a new flutter release. In my case, the solution had nothing to do with the error. Just outdated dependencies.

I first did flutter clean (IntelliJ/Android Studio from the tools>Flutter>Flutter clean.)

Updated my pubspec.yaml dependencies to their latest version and ran flutter pub upgrade

Finished! Now you should be able to build and run

0
votes

try in terminal

$     flutter clean

after

$     flutter doctor 

that should solve your issue

0
votes

I faced the same issue, after deleting the .dart_tool directory/folder and running the application again, the problem solved