Indicate the message that causes the loop

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@276814 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/Project.java

@@ -2015,7 +2015,8 @@ public class Project {
             if (loggingMessage) {
                 throw new BuildException("Listener attempted to access "
                     + (priority == MSG_ERR ? "System.err" : "System.out")
-                    + " - infinite loop terminated");
+                    + " with message [" + message
+                    + "] - infinite loop terminated");
             }
             try {
                 loggingMessage = true;