--- a/langtools/src/share/classes/com/sun/tools/javac/comp/Attr.java	Tue Mar 04 15:45:20 2008 +0000
+++ b/langtools/src/share/classes/com/sun/tools/javac/comp/Attr.java	Thu Mar 06 10:07:25 2008 -0800
@@ -1609,17 +1609,10 @@
                               tree.getTag() - JCTree.ASGOffset,
                               owntype,
                               operand);
-            if (types.isSameType(operator.type.getReturnType(), syms.stringType)) {
-                // String assignment; make sure the lhs is a string
-                chk.checkType(tree.lhs.pos(),
-                              owntype,
-                              syms.stringType);
-            } else {
-                chk.checkDivZero(tree.rhs.pos(), operator, operand);
-                chk.checkCastable(tree.rhs.pos(),
-                                  operator.type.getReturnType(),
-                                  owntype);
-            }
+            chk.checkDivZero(tree.rhs.pos(), operator, operand);
+            chk.checkCastable(tree.rhs.pos(),
+                              operator.type.getReturnType(),
+                              owntype);
         }
         result = check(tree, owntype, VAL, pkind, pt);
     }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/StringConversion2.java	Thu Mar 06 10:07:25 2008 -0800
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2008 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 4741726
+ * @summary allow Object += String
+ */
+
+public class StringConversion2
+{
+    public static void main(String[] args) {
+        Object o = "Hello ";
+        String s = "World!";
+        o += s;
+        if (!o.equals("Hello World!"))
+            throw new Error("test failed");
+    }
+}

--- a/langtools/test/tools/javac/expression/ObjectAppend.java	Tue Mar 04 15:45:20 2008 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,36 +0,0 @@
-/*
- * Copyright 2002 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 4642850
- * @summary compiler allows Object += String
- * @author gafter
- *
- * @compile/fail ObjectAppend.java
- */
-
-class ObjectAppend {{
-    Object o = null;
-    o += "string";
-}}