Dart hotfixes blocked on beta/stable: Flutter engine depends on unstable Windows arm64 Dart SDK #113931
Description
The Flutter Engine depends on the unstable Dart SDK for Windows ARM64:
https://github.com/flutter/engine/blob/6bb2f03e6fd00b440e6ab2e20ad94b8104cc12e7/DEPS#L398
This SDK was never meant to be published on beta and stable channels. Dart has recently changed the release tooling to no longer produce these SDKs on beta and stable. The same will apply to Linux RISCV SDKs but those are currently not used by Flutter.
Now Flutter can no longer receive beta and stable hotfixes from Dart because they are missing the Windows ARM64 SDKs. Dart 2.18.3 was not included in the latest Flutter hotfix because of this issue.