Flutter - Dart failing after Android Studio and Flutter update

Question

I had a project that was running without issues and, since I updated to Android Studio 3.5.3 and Flutter 1.13.1-pre.99 • channel master, the same project gives a huge error when trying to run on real device.

I am mentioning here Android Studio and Flutter updates because I am not sur which of them (if any) is causing the problems.

It looks to me like a problem with flutter_web that I installed some time ago...but still Im not sure how to uninstall flutter_web itself.

NOTE: the current project is NOT a flutter web project

Here the complete error...(sorry for the huge text):

Invalid depfile: /Users/user458395/Desktop/flutterProjects/testProjectX/.dart_tool/flutter_build/0732b8ad26463ce096dc3cab1564707e/kernel_snapshot.d
Invalid depfile: /Users/user458395/Desktop/flutterProjects/testProjectX/.dart_tool/flutter_build/0732b8ad26463ce096dc3cab1564707e/kernel_snapshot.d

Compiler message:
lib/routes/search_results_route.dart:1:8: Error: Not found: 'dart:html'
import 'dart:html';
       ^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:6:8: Error: Not found: 'dart:html'
import 'dart:html';
       ^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:97:25: Error: Type 'HttpRequest' not found.
  void _openHttpRequest(HttpRequest request, String method, String url,
                        ^^^^^^^^^^^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:32:25: Error: 'HttpRequest' isn't a type.
  final _xhrs = new Set<HttpRequest>();
                        ^^^^^^^^^^^
../../../Downloads/flutterSdk/flutter/packages/flutter/lib/src/painting/_network_image_web.dart:64:12: Error: Method not found: 'webOnlyInstantiateImageCodecFromUrl'.
    return ui.webOnlyInstantiateImageCodecFromUrl(resolved) as Future<ui.Codec>; // ignore: undefined_function
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:46:19: Error: Method not found: 'HttpRequest'.
    var xhr = new HttpRequest();
                  ^^^^^^^^^^^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:57:45: Error: Method not found: 'Blob'.
      var blob = xhr.response == null ? new Blob([]) : xhr.response;
                                            ^^^^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:58:24: Error: Method not found: 'FileReader'.
      var reader = new FileReader();
                       ^^^^^^^^^^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:97:25: Error: 'HttpRequest' isn't a type.
  void _openHttpRequest(HttpRequest request, String method, String url,
                        ^^^^^^^^^^^
Unhandled exception:
FileSystemException(uri=org-dartlang-untranslatable-uri:dart%3Ahtml; message=StandardFileSystem only supports file:* and data:* URIs)
#0      StandardFileSystem.entityForUri (package:front_end/src/api_prototype/standard_file_system.dart:33:7)
#1      asFileUri (package:vm/kernel_front_end.dart:604:37)
#2      writeDepfile (package:vm/kernel_front_end.dart:799:21)
<asynchronous suspension>
#3      FrontendCompiler.compile (package:frontend_server/frontend_server.dart:472:15)
<asynchronous suspension>
#4      _FlutterFrontendCompiler.compile (package:flutter_frontend_server/server.dart:38:22)
#5      starter (package:flutter_frontend_server/server.dart:149:27)
#6      main (file:///b/s/w/ir/cache/builder/src/flutter/flutter_frontend_server/bin/starter.dart:8:30)
#7      _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:305:32)
#8      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:174:12)

Target kernel_snapshot failed: Exception: Errors during snapshot creation: null
build failed.

FAILURE: Build failed with an exception.

* Where:
Script '/Users/user458395/Downloads/flutterSdk/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 792

* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command '/Users/user458395/Downloads/flutterSdk/flutter/bin/flutter'' 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 36s
Finished with error: Gradle task assembleDebug failed with exit code 1

Answer 1

EDIT: to get rid from this issue switch back to stable channel by running this command in the terminal.

flutter channel stable

run flutter upgrade after this.

---

Please check detailed error by this command

flutter run --debug

Point to remember: if its not a web project then Find and remove dart:html.

dart:html library is for web apps only (it wraps the DOM APIs) and it is not supposed run in Flutter. Please check this git issue