ExecDumpClient should report error when no data is retrieved (#538)

diff --git a/org.jacoco.doc/docroot/doc/changes.html b/org.jacoco.doc/docroot/doc/changes.html
index e8a940c..849a4e5 100644
--- a/org.jacoco.doc/docroot/doc/changes.html
+++ b/org.jacoco.doc/docroot/doc/changes.html
@@ -43,6 +43,13 @@
       (GitHub <a href="https://github.com/jacoco/jacoco/issues/498">#498</a>).</li>
 </ul>
 
+<h3>Fixed Bugs</h3>
+<ul>
+  <li><code>dump</code> commands now report error when server unexpectedly
+      closes connection without sending response
+      (GitHub <a href="https://github.com/jacoco/jacoco/issues/538">#538</a>).</li>
+</ul>
+
 <h3>Non-functional Changes</h3>
 <ul>
   <li>More information about context is provided when unable to read input during