Clarify why bug12985 is a thing

diff --git a/changes/bug12985 b/changes/bug12985
index dc14cdd37578314f55190216de44579735a2744d..636ae4d564a9e240d472b6003aeb1f0e9a74b781 100644 (file)
--- a/changes/bug12985
+++ b/changes/bug12985
@@ -1,4 +1,5 @@
   o Minor bugfixes (shutdown):
     - When shutting down, always call event_del() on lingering read or
-      write events before freeing them. Fixes bug 12985; bugfix on
+      write events before freeing them. Otherwise, we risk double-frees
+      or read-after-frees in event_base_free(). Fixes bug 12985; bugfix on
       0.1.0.2-rc.