A combination of `runZoned` and `runZonedGuarded` where only the latter allows an `onError` parameter,
and only that has a nullable return type.
Retains the `onError` parameter on `runZoned` for now because it's too breaking to remove it until packages have been migrated off of it.
It will be removed in a follow-up CL.
Change-Id: If0e86c8d14e13fa089c66f4af975aeacb2616cf6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/137302
Reviewed-by: Jake Macdonald <jakemac@google.com>
Reviewed-by: Nate Bosch <nbosch@google.com>
Switch default for StreamController.addStream cancelOnError parameter to false.
Add orElse named argument to Stream.{first,last}Where.
First step in renaming the argument from defaultValue to orElse.
Change-Id: I22039c1f6933664ebc287c71e802799a64776f08
Reviewed-on: https://dart-review.googlesource.com/34822
Commit-Queue: Lasse R.H. Nielsen <lrn@google.com>
Reviewed-by: Leaf Petersen <leafp@google.com>