[Bug]: crash on Safari<16

[holzgeist]

Please check the following before submitting a new issue.

• I have searched the existing issues.
• I have carefully read the documentation and verified I have added the required platform specific configuration.

Please select affected platform(s)

• Android
• iOS
• Windows

Steps to reproduce

1. build an app for web using permission_handler in debug configuration

flutter build web \
    --dart-define-from-file=config.json \
    --source-maps \
    --web-renderer auto \
    -t lib/web_main.dart \
    -O 1 \
    --dart-define=Dart2jsOptimization=O0

3. load the app

Expected results

App loads

Actual results

App crashes (see screenshot below)

Code sample

Code sample

N/A as this happens in initialization code, i.e. any code sample will trigger this

Screenshots or video

Screenshots or video demonstration

Version

11.3.1

Flutter Doctor output

Doctor output

[✓] Flutter (Channel stable, 3.24.3, on Arch Linux 6.10.10-arch1-1, locale en_US.UTF-8)
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[✓] Chrome - develop for the web
[✓] Linux toolchain - develop for Linux desktop
[✓] Android Studio (version 2024.1)
[✓] Connected device (2 available)
[✓] Network resources