diff -r d4b3cb1ece84 -r c75be5bc5283 src/share/classes/com/sun/tools/javac/util/DiagnosticSource.java
--- a/src/share/classes/com/sun/tools/javac/util/DiagnosticSource.java	Sat Oct 06 10:35:38 2012 +0100
+++ b/src/share/classes/com/sun/tools/javac/util/DiagnosticSource.java	Tue Oct 09 19:10:00 2012 -0700
@@ -28,12 +28,10 @@
 import java.io.IOException;
 import java.lang.ref.SoftReference;
 import java.nio.CharBuffer;
-import java.util.Map;
 import javax.tools.JavaFileObject;
 
 import com.sun.tools.javac.file.JavacFileManager;
 import com.sun.tools.javac.tree.EndPosTable;
-import com.sun.tools.javac.tree.JCTree;
 
 import static com.sun.tools.javac.util.LayoutCharacters.*;