--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/util/BasicDiagnosticFormatter.java	Sat Nov 08 22:00:31 2014 +0000
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/util/BasicDiagnosticFormatter.java	Fri Oct 24 10:08:51 2014 +0200
@@ -111,6 +111,8 @@
         Collection<String> args = formatArguments(d, l);
         String msg = localize(l, d.getCode(), args.toArray());
         String[] lines = msg.split("\n");
+        if (lines.length == 0) // will happen when msg only contains one or more separators: "\n", "\n\n", etc.
+            lines = new String[] { "" };
         if (getConfiguration().getVisible().contains(DiagnosticPart.SUMMARY)) {
             currentIndentation += getConfiguration().getIndentation(DiagnosticPart.SUMMARY);
             buf.append(indent(lines[0], currentIndentation)); //summary

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/util/NewlineOnlyDiagnostic.java	Fri Oct 24 10:08:51 2014 +0200
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import javax.annotation.processing.*;
+import javax.tools.Diagnostic.Kind;
+import javax.lang.model.element.TypeElement;
+import java.util.Set;
+
+/*
+ * @test
+ * @bug 8060448
+ * @summary Test that javac doesn't throw ArrayIndexOutOfBoundsException
+ *          when logging the message "\n"
+ * @library /tools/javac/lib
+ * @build   JavacTestingAbstractProcessor NewlineOnlyDiagnostic
+ * @compile -processor NewlineOnlyDiagnostic NewlineOnlyDiagnostic.java
+ */
+
+public class NewlineOnlyDiagnostic extends JavacTestingAbstractProcessor {
+
+    @Override
+    public boolean process(Set<? extends TypeElement> types,RoundEnvironment rEnv) {
+        processingEnv.getMessager().printMessage(Kind.NOTE,"\n");
+        return true;
+    }
+}