--- a/src/share/classes/com/sun/tools/javac/comp/Resolve.java	Thu Jul 16 10:53:31 2009 -0700
+++ b/src/share/classes/com/sun/tools/javac/comp/Resolve.java	Fri Jul 17 09:14:45 2009 -0700
@@ -251,7 +251,8 @@
             return true;
         else {
             Symbol s2 = ((MethodSymbol)sym).implementation(site.tsym, types, true);
-            return (s2 == null || s2 == sym);
+            return (s2 == null || s2 == sym ||
+                    !types.isSubSignature(types.memberType(site, s2), types.memberType(site, sym)));
         }
     }
     //where

--- a/src/share/classes/com/sun/tools/javac/util/RichDiagnosticFormatter.java	Thu Jul 16 10:53:31 2009 -0700
+++ b/src/share/classes/com/sun/tools/javac/util/RichDiagnosticFormatter.java	Fri Jul 17 09:14:45 2009 -0700
@@ -569,7 +569,8 @@
         @Override
         public Void visitMethodSymbol(MethodSymbol s, Void ignored) {
             visit(s.owner, null);
-            typePreprocessor.visit(s.type);
+            if (s.type != null)
+                typePreprocessor.visit(s.type);
             return null;
         }
     };

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/Diagnostics/6860795/T6860795.java	Fri Jul 17 09:14:45 2009 -0700
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/**
+ * @test
+ * @bug     6860795
+ * @summary NullPointerException when compiling a negative java source
+ * @author  mcimadamore
+ * @compile/fail/ref=T6860795.out -XDrawDiagnostics  T6860795.java
+ */
+
+class Test {
+    void foo(float x, int x) {}
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/Diagnostics/6860795/T6860795.out	Fri Jul 17 09:14:45 2009 -0700
@@ -0,0 +1,2 @@
+T6860795.java:33:27: compiler.err.already.defined: x, foo
+1 error

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/generics/rawOverride/T6846972.java	Fri Jul 17 09:14:45 2009 -0700
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug 6846972
+ * @summary cannot access member of raw type when erasure change overriding into overloading
+ * @author mcimadamore
+ * @compile T6846972.java
+ */
+
+import java.util.EnumMap;
+
+public class T6846972 {
+
+    enum Suit {
+        CLUBS, DIAMONDS;
+    }
+
+    static Object [] array = {
+        Suit.CLUBS, "value1",
+        Suit.DIAMONDS, "value2"
+    };
+
+    static void test() {
+        EnumMap map = new EnumMap(Suit.class);
+        map.put(array[0], array[1]);
+    }
+}