--- a/CHANGELOG	Wed Jul 31 10:52:14 2019 -0700
+++ b/CHANGELOG	Fri Jul 12 23:43:25 2019 +0530
@@ -5,6 +5,7 @@
 -------------------
 
   * prune: clarify error message when no revision were passed,
+  * evolve: avoid possible race conditions bu locking earlier
 
 9.1.0 -- 2019-07-29
 -------------------