To create it you can use flutter create bug command and update
the main.dart file.

Alternatively, you can use DartPad, which is capable
of creating and running small Flutter apps.

If your problem goes out of what can be placed in a single file, for example
you have a problem with native channels, you can upload the full code of
the reproduction into a separate repository and link it.

Provide some Flutter diagnostics

Run flutter doctor -v in your project directory and paste
the results into the GitHub issue:

Run the command in verbose mode

Follow these steps only if your issue is related to the
flutter tool.

All Flutter commands accept the --verbose flag.
If attached to the issue, the output from this command
might aid in diagnosing the problem.

Attach the results of the command to the GitHub issue.

Provide the most recent logs

Logs for the currently connected device are accessed
using flutter logs.