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The sync operations on a MultiStreamController did not check whether sending events at the current time was allowed. That could lead to `null` dereferencing errors when doing operations on the controller after a cancel, and could cause events to appear out of order. Change-Id: I06b86a78959dfcaa402f74e2980a9d515f097dc9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/159442 Reviewed-by: Erik Ernst <eernst@google.com> Commit-Queue: Lasse R.H. Nielsen <lrn@google.com>
This directory contains tests of the language and core library implementations. For more information, see https://github.com/dart-lang/sdk/wiki/Testing.