Add a release note about the VM going sync-async
Bug: none
Change-Id: Idf1499bddb3f40034512d8ee349b3bee5f4c552b
Reviewed-on: https://dart-review.googlesource.com/57641
Reviewed-by: Florian Loitsch <floitsch@google.com>
Commit-Queue: Samuel Rawlins <srawlins@google.com>
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 577a71c..f96790f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -114,6 +114,14 @@
* Added `FileSystemEntity.fromRawPath` constructor to allow for
the creation of `FileSystemEntity` using `Uint8List` buffers.
+### Dart VM
+
+* `async` functions now start synchronously when previewing Dart 2 with
+ `--preview-dart-2`. Build tools (e.g., build_runner) may override the
+ default and/or allow developers to configure. Passing the
+ `--no-sync-async` flag will produce the old behavior, starting `async`
+ functions asynchronously.
+
### Tool Changes
#### dartfmt
