diff -r 9f73620a65fe -r b8d54f4625cb relnotes/next
--- a/relnotes/next	Mon Jul 08 15:01:18 2019 -0700
+++ b/relnotes/next	Tue Jul 09 12:58:29 2019 +0300
@@ -81,6 +81,10 @@
 
  * `cmdutil.checkunfinished()` now includes detection for merge too.
 
+ * merge abort has been disallowed in case an operation of higher
+   precedence is in progress to avoid cases of partial abort of
+   operations.
+
  * We used to automatically attempt to make extensions compatible with
    Python 3 (by translating their source code while loading it). We no
    longer do that.