[release] Add release notes for 2.12.4
Change-Id: I70a28319e0da7c136ee93c3ca25942de129763fd
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/195278
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e2d2fb1..f4f9795 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,11 @@
-## 2.12.3 - 2021-04-12
+## 2.12.4 - 2021-04-15
+
+This is a patch release that fixes a Dart VM compiler crashes when compiling
+initializers containing async closures (issue [#45306][]).
+
+[#45306]: https://github.com/dart-lang/sdk/issues/45306
+
+## 2.12.3 - 2021-04-14
This is a patch release that fixes a vulnerability in `dart:html` related to
DOM clobbering. Thanks again to **Vincenzo di Cicco** for finding and reporting
