Bug: Not compiling at Flutter Master after latest update

[brunodmn]

Describe the bug
It just stopped compiling after latest Flutter Master upgrade
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. change to master channel with flutter channel master and flutter upgrade
2. run your application

Additional context

Logs

../../.pub-cache/hosted/pub.dev/introduction_screen-3.1.0/lib/src/introduction_screen.dart:505:35: Error: The method 'elementAtOrNull' is defined in multiple extensions for 'List' and neither is more specific. - 'List' is from 'dart:core'. - 'ScrollController' is from 'package:flutter/src/widgets/scroll_controller.dart' ('../flutter/packages/flutter/lib/src/widgets/scroll_controller.dart'). Try using an explicit extension application of the wanted extension or hiding unwanted extensions from scope. ?.elementAtOrNull(index), ^^^^^^^^^^^^^^^ ../../.pub-cache/hosted/pub.dev/collection-1.17.0/lib/src/list_extensions.dart:271:6: Context: This is one of the extension members. E? elementAtOrNull(int index) => (index < length) ? this[index] : null; ^^^^^^^^^^^^^^^ ../../.pub-cache/hosted/pub.dev/introduction_screen-3.1.0/lib/src/helper.dart:6:6: Context: This is one of the extension members. T? elementAtOrNull(int index) { ^^^^^^^^^^^^^^^ Target kernel_snapshot failed: Exception

FAILURE: Build failed with an exception.

[ghenry]

Hi @brunodmn

Thanks for this. We only test on flutter stable at the moment.

Gavin.

[ghenry]

So when master becomes stable, we'll need to update our helper.

Will leave open and take look when I can.

Thanks for the report.

What features are you using from master anyway?

[brunodmn]

Hi @ghenry ,

Thank you for quick reply and congrats for the nice job and to share it with us.

I am working on a Material You project and master is quite ahead. I tried to change to stable bug got a bit uglier in design.
My options are redesign or remove your package, if this bug is to hard to fix.
Would be a shame to remove your package as you did such a nice job, but would consume me much less time.
I would totally understand if you consider this not a bug (as it's not showing on stable channel) and close this thread.

Thanks

[ghenry]

No worries. I'm just helping maintain, not the creator :) I'll have a look, but a fix must be backward compatible, so it depends... Will let you know. Thanks.

[kaboc]

I'm experiencing the issue in the stable version of Flutter. It occurs if the app project is using package:collection 1.17.0. A quick solution is to using collection 1.16.0.

[ghenry]

So it's this:

https://github.com/dart-lang/collection/blob/efd709fc1760a595f8575f4137a1847de1b49d76/lib/src/list_extensions.dart#L270

in latest dart collections, which I guess @Pyozer added because it wasn't there in stable.

[ghenry]

I'll commit a change after testing again on stable, but Flutter master is working now. Updated our code to pick the extension:

https://dart.dev/tools/diagnostic-messages?utm_source=dartdev&utm_medium=redir&utm_id=diagcode&utm_content=ambiguous_extension_member_access#ambiguous_extension_member_access

Gavin.

[ghenry]

That should be you now @brunodmn

I'll get a release prepared, but you might need to run from git for now.

[ghenry]

Prepping a new release for you @brunodmn

[ghenry]

Done! https://pub.dev/packages/introduction_screen

[brunodmn]

Worked!
Thanks a lot