From c9ace73ffb88749522508170f5b1314e05b24313 Mon Sep 17 00:00:00 2001
From: Leaf Petersen <leafp@google.com>
Date: Wed, 29 May 2019 22:53:47 +0000
Subject: [PATCH] CHANGELOG entry for covariance in super-interfaces.

Change-Id: I4849bca9c5059757b89124c044bc99bfc83dfbfb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/104161
Reviewed-by: Kevin Moore <kevmoo@google.com>
Commit-Queue: Leaf Petersen <leafp@google.com>
---
 CHANGELOG.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index ee1adaf96cb..ff13f2f69cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,9 +4,20 @@
 
 ### Language
 
+*   **Breaking change:** Covariance of type variables used in super-interfaces
+    is now enforced (issue [35097][]).  For example, the following code was
+    previously accepted and will now be rejected:
+
+```dart
+class A<X> {};
+class B<X> extends A<void Function(X)> {};
+```
+
 * The identifier `async` can now be used in asynchronous and generator
   functions.
 
+[35097]: https://github.com/dart-lang/sdk/issues/35097
+
 ### Core libraries
 
 #### `dart:developer`