Dartpad on Safari doesn't show flutter

[camfrandsen]

This was working earlier this week on Wednesday, May 8th. I noticed it not working yesterday, May 9th.

When I try to run any flutter code in dartpad, it doesn't show anything.

What happened?

When I attempt to run any flutter code, it says it compiles, but then shows nothing. This does work in the other browsers though. I will also note that pure dart code also runs just fine.

Steps to reproduce problem

The code that I am attempting to run is the code that is generated when you click New -> flutter.

This is very reproducible, and have reproduced it on two different machines running safari. (a laptop and a Mac mini) All you have to do is try to run flutter code.

Additional info

Browser

Browser: Safari

Version: Version 17.4.1 (19618.1.15.11.14)

Are you using any extensions/plugins that affect website behavior
(particularly those that affect iframes, such as ad blockers)?

Not using any extensions

Are there any warnings or errors in your browser's JavaScript console?
If so, paste them below:

[Error] Not allowed to load local resource: blob://nullnull/main.dart.js.map
[Error] Not allowed to request resource
[Error] Cannot load blob://nullnull/main.dart.js.map due to access control checks.

Machine

Operating system: Mac

Version: 14.4.1 (23E224)

Your code

What code was in the editor, if any, when the failure occurred? You
can paste it in below:

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: Text('Hello, World!'),
        ),
      ),
    );
  }
}

DartPad's output

Did DartPad print anything to the console pane? If so, paste it below:
None

If you were running Flutter code, you can also paste an image of the
Flutter output directly into this bug report.
None

Screen.Recording.2024-05-10.at.8.54.21.PM.mov

[joodo]

Same problem on macOS and Firefox 125.0.3

[johnpryan]

Thanks for filing an issue, this is fixed by #2965