[Solved] error: Struct ‘Utf8’ is empty. Support for empty structs is deprecated… Use Opaque instead in flutter

Hello Guys, how are you all? Hope you all are fine. You might face error: Struct ‘Utf8’ is empty. Support for empty structs is deprecated… Use Opaque instead in flutter as this error in a flutter. here I come with all possible solutions for this error.

we are providing you all possible solutions to solve this error. let’s start this article without wasting your time.

How error: Struct ‘Utf8’ is empty. Support for empty structs is deprecated… Use Opaque instead in flutter Occur ?

I Recently face Error when I run my app. And I didn’t change anything or add anything to my app that would cause something like this, the only thing I did recently was upgrade to the latest version of Flutter.

I’m getting below same Error continuously.

../../../../../flutter/flutter/.pub-cache/hosted/pub.dartlang.org/ffi-0.1.3/lib/src/utf16.dart:16:7: Info: Struct 'Utf16' is empty. Support for empty structs is deprecated and will be removed in the next stable version of Dart. Use Opaque instead.
class Utf16 extends Struct {

In My flutter doctor command No issues found!

How to solve error: Struct ‘Utf8’ is empty. Support for empty structs is deprecated… Use Opaque instead in flutter

Solution 1

This Flutter SDK version has an error, The Previous version working well so you can solve this issue by downgrade flutter. Just use below command in flutter console.

The two that actually work, and I’ve tested them, are:

flutter downgrade v[flutter build version]

For instance:

flutter downgrade v1.22.5

And the other one: go to your flutter sdk folder, that is your folder named “flutter” and inside it open a new terminal. Then type:

git checkout [flutter build version]

For instance:

git checkout 1.22.3

Then do flutter doctor and you’ll confirm you switched correctly.

Solution 2

Just Downgrade Flutter SDK version by Below Command.

flutter downgrade

Summery

So it’s all About All possible solutions. Hope this above all solution helped you a lot. Comment below Your thoughts and your queries. Comment Below on your suggestion.

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