diff --git a/src/main/org/apache/tools/ant/DefaultLogger.java b/src/main/org/apache/tools/ant/DefaultLogger.java
index 05687c730..5342de706 100644
--- a/src/main/org/apache/tools/ant/DefaultLogger.java
+++ b/src/main/org/apache/tools/ant/DefaultLogger.java
@@ -130,6 +130,22 @@ public class DefaultLogger implements BuildLogger {
         startTime = System.currentTimeMillis();
     }
 
+    static void throwableMessage(StringBuffer m, Throwable error, boolean verbose) {
+        while (error instanceof BuildException) { // #43398
+            Throwable cause = ((BuildException) error).getCause();
+            if (cause != null && cause.toString().equals(error.getMessage())) {
+                error = cause;
+            } else {
+                break;
+            }
+        }
+        if (verbose || !(error instanceof BuildException)) {
+            m.append(StringUtils.getStackTrace(error));
+        } else {
+            m.append(error).append(lSep);
+        }
+    }
+
     /**
      * Prints whether the build succeeded or failed,
      * any errors the occurred during the build, and
@@ -148,22 +164,7 @@ public class DefaultLogger implements BuildLogger {
             message.append(StringUtils.LINE_SEP);
             message.append(getBuildFailedMessage());
             message.append(StringUtils.LINE_SEP);
-
-            while (error instanceof BuildException) { // #43398
-                Throwable cause = ((BuildException) error).getCause();
-                if (cause != null && cause.toString().equals(error.getMessage())) {
-                    error = cause;
-                } else {
-                    break;
-                }
-            }
-
-            if (Project.MSG_VERBOSE <= msgOutputLevel
-                || !(error instanceof BuildException)) {
-                message.append(StringUtils.getStackTrace(error));
-            } else {
-                message.append(error.toString()).append(lSep);
-            }
+            throwableMessage(message, error, Project.MSG_VERBOSE <= msgOutputLevel);
         }
         message.append(StringUtils.LINE_SEP);
         message.append("Total time: ");
diff --git a/src/tests/junit/org/apache/tools/ant/DefaultLoggerTest.java b/src/tests/junit/org/apache/tools/ant/DefaultLoggerTest.java
new file mode 100644
index 000000000..5f05093f6
--- /dev/null
+++ b/src/tests/junit/org/apache/tools/ant/DefaultLoggerTest.java
@@ -0,0 +1,73 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+
+package org.apache.tools.ant;
+
+import java.io.PrintWriter;
+import junit.framework.TestCase;
+
+public class DefaultLoggerTest extends TestCase {
+
+    public DefaultLoggerTest(String n) {
+        super(n);
+    }
+
+    private static String msg(Throwable error, boolean verbose) {
+        StringBuffer m = new StringBuffer();
+        DefaultLogger.throwableMessage(m, error, verbose);
+        return m.toString();
+    }
+
+    public void testThrowableMessage() throws Exception { // #43398
+        BuildException be = new BuildException("oops", new Location("build.xml", 1, 0));
+        assertEquals(
+                "build.xml:1: oops\n",
+                msg(be, false));
+        be = ProjectHelper.addLocationToBuildException(be, new Location("build.xml", 2, 0));
+        assertEquals(
+                "build.xml:2: The following error occurred while executing this line:\n" +
+                "build.xml:1: oops\n",
+                msg(be, false));
+        be = ProjectHelper.addLocationToBuildException(be, new Location("build.xml", 3, 0));
+        assertEquals(
+                "build.xml:3: The following error occurred while executing this line:\n" +
+                "build.xml:2: The following error occurred while executing this line:\n" +
+                "build.xml:1: oops\n",
+                msg(be, false));
+        Exception x = new Exception("problem") {
+            public void printStackTrace(PrintWriter w) {
+                w.println("problem");
+                w.println("  at p.C.m");
+            }
+        };
+        be = new BuildException(x);
+        assertEquals(
+                "problem\n" +
+                "  at p.C.m\n",
+                msg(be, false));
+        /* XXX still broken:
+        be = ProjectHelper.addLocationToBuildException(be, new Location("build.xml", 1, 0));
+        assertEquals(
+                "The following error occurred while executing this line:\n" +
+                "build.xml:1: problem\n" +
+                "  at p.C.m\n",
+                msg(be, false));
+         */
+    }
+
+}