[JENKINS-18024] Noting.

changelog.html

@@ -55,6 +55,9 @@ Upcoming changes</a>
 <!-- Record your changes in the trunk here. -->
 <div id="trunk" style="display:none"><!--=TRUNK-BEGIN=-->
 <ul class=image>
+  <li class=bug>
+    NPE in <code>DefaultMatrixExecutionStrategyImpl.waitForCompletion</code>.
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-18024">issue 18024</a>)
   <li class=bug>
     User icon in People broken if Jenkins root URL unconfigured.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-18118">issue 18118</a>)