diff -r a497a919b562 -r 4660a5da7d90 langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/file/JavacFileManager.java
--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/file/JavacFileManager.java	Thu Sep 25 14:38:29 2014 -0700
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/file/JavacFileManager.java	Wed Oct 29 12:09:17 2014 +0100
@@ -76,6 +76,7 @@
  */
 public class JavacFileManager extends BaseFileManager implements StandardJavaFileManager {
 
+    @SuppressWarnings("cast")
     public static char[] toArray(CharBuffer buffer) {
         if (buffer.hasArray())
             return ((CharBuffer)buffer.compact().flip()).array();