Gradle task fail - Invalid depfile

Question

I am a complete beginner at all of this and trying to half-teach myself, so please give advice step by step.

I'm trying to make an app using Android Studio and Flutter on Windows. When I try to run my app through the emulator (I'm using genymotion as I have a Ryzen cpu) here's what the console says:

Invalid depfile: C:\Users\me\AndroidStudioProjects\i_am_rich\.dart_tool\flutter_build\483fc1f7e1eeed45c31ebc61a3e78ae0\kernel_snapshot.d
Invalid depfile: C:\Users\me\AndroidStudioProjects\i_am_rich\.dart_tool\flutter_build\483fc1f7e1eeed45c31ebc61a3e78ae0\kernel_snapshot.d

Compiler message:
lib/main.dart:1:8: Error: Not found: 'dart:html'
import 'dart:html';
   ^
/C:/src/flutter/flutter/packages/flutter/lib/src/painting/_network_image_web.dart:64:12: Error: Method not found: 'webOnlyInstantiateImageCodecFromUrl'.
return ui.webOnlyInstantiateImageCodecFromUrl(resolved); // ignore: undefined_function
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
U
nhandled exception:
FileSystemException(uri=org-dartlang-u
ntranslatable-uri:dart%3Ahtml; message=StandardFileSystem only supports file:* and data:* URIs)
#0      StandardFileSystem.entityForUri (package:front_end/src/api_prototype/stan
dard_file_system.dart:33:7)
#1      asFileUri (package:vm/kernel_fron
t_end.dart:604:37)
#2      writeDepfile (package:vm/kernel_front_end.da
rt:799:21)
<asynchronous suspension>
#3      FrontendCompiler.comp
ile (package:frontend_server/frontend_server.dart:472:15)
<asynch
ronous suspension>
#4      _FlutterFrontendCompiler.compile (package:flutt
er_frontend_server/server.dart:38:22)
#5      starter (package:flu
tter_frontend_server/server.dart:149:27)
#6      main (file://
/C:/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      _Ra
wReceivePortImpl._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 'C:\src\flutter\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 780

* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'C:\src\flutter\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 33s
Finished with error: Gradle task assembleDebug failed with exit code 1

When I run flutter doctor this in the console:

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, v1.12.13+hotfix.7, on Microsoft Windows [Version 10.0.18363.592], locale 
en-AU)

[√] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
[√] Android Studio (version 3.5)
[√] Connected device (1 available)

• No issues found!

And when I attempt flutter clean:

Error: No pubspec.yaml file found.
This command should be run from the root of your Flutter project.
Do not run this command from the root of your git clone of Flutter.

My flutter console is in C:\src\flutter\flutter. I really have no idea what I'm doing or how to fix this, and I'm feeling a little disheartened! Any advice would be wonderful. Thank you.

Answer 1

Remove that Dart.html file and run your project. It will work

Answer 2

To use flutter clean redirect yourself (cd..) into the folder where your pubspec.yaml file is located. I am currently facing the same issue, but this takes away the "invalid deepfile" issue.