### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: compiler/org/eclipse/jdt/internal/compiler/ast/CompoundAssignment.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/ast/CompoundAssignment.java,v
retrieving revision 1.55
diff -u -r1.55 CompoundAssignment.java
--- compiler/org/eclipse/jdt/internal/compiler/ast/CompoundAssignment.java	27 Jun 2008 16:03:55 -0000	1.55
+++ compiler/org/eclipse/jdt/internal/compiler/ast/CompoundAssignment.java	11 Nov 2008 23:30:46 -0000
@@ -153,8 +153,8 @@
 			return null;
 		}
 		if (this.operator == PLUS){
-			if(lhsID == T_JavaLangObject) {
-				// <Object> += <String> is illegal (39248)
+			if(lhsID == T_JavaLangObject && (scope.compilerOptions().complianceLevel < ClassFileConstants.JDK1_7)) {
+				// <Object> += <String> is illegal (39248) for compliance < 1.7
 				scope.problemReporter().invalidOperator(this, lhsType, expressionType);
 				return null;
 			} else {
#P org.eclipse.jdt.core.tests.compiler
Index: src/org/eclipse/jdt/core/tests/compiler/regression/TestAll.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/TestAll.java,v
retrieving revision 1.74
diff -u -r1.74 TestAll.java
--- src/org/eclipse/jdt/core/tests/compiler/regression/TestAll.java	27 Jun 2008 16:04:45 -0000	1.74
+++ src/org/eclipse/jdt/core/tests/compiler/regression/TestAll.java	11 Nov 2008 23:30:47 -0000
@@ -155,6 +155,7 @@
 		tests_1_7.addAll(since_1_4);
 		tests_1_7.addAll(since_1_5);
 		tests_1_7.addAll(since_1_6);
+		tests_1_7.add(AssignmentTest_1_7.class);
 		// Reset forgotten subsets tests
 		TestCase.TESTS_PREFIX = null;
 		TestCase.TESTS_NAMES = null;
Index: src/org/eclipse/jdt/core/tests/compiler/regression/AssignmentTest_1_7.java
===================================================================
RCS file: src/org/eclipse/jdt/core/tests/compiler/regression/AssignmentTest_1_7.java
diff -N src/org/eclipse/jdt/core/tests/compiler/regression/AssignmentTest_1_7.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ src/org/eclipse/jdt/core/tests/compiler/regression/AssignmentTest_1_7.java	1 Jan 1970 00:00:00 -0000
@@ -0,0 +1,67 @@
+/*******************************************************************************
+ * Copyright (c) 2005, 2008 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.core.tests.compiler.regression;
+
+import java.util.Map;
+
+import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
+
+import junit.framework.Test;
+
+public class AssignmentTest_1_7 extends AbstractRegressionTest {
+
+public AssignmentTest_1_7(String name) {
+	super(name);
+}
+protected Map getCompilerOptions() {
+	Map options = super.getCompilerOptions();
+	options.put(CompilerOptions.OPTION_ReportNullReference, CompilerOptions.ERROR);
+	options.put(CompilerOptions.OPTION_ReportPotentialNullReference, CompilerOptions.ERROR);
+	options.put(CompilerOptions.OPTION_ReportRedundantNullCheck, CompilerOptions.ERROR);
+	options.put(CompilerOptions.OPTION_ReportNoEffectAssignment, CompilerOptions.ERROR);
+	return options;
+}
+// Static initializer to specify tests subset using TESTS_* static variables
+// All specified tests which does not belong to the class are skipped...
+static {
+//	TESTS_NAMES = new String[] { "test000" };
+//	TESTS_NUMBERS = new int[] { 61 };
+//	TESTS_RANGE = new int[] { 11, -1 };
+}
+public static Test suite() {
+	return buildMinimalComplianceTestSuite(testClass(), F_1_7);
+}
+/*
+ * no effect assignment bug
+ * http://bugs.eclipse.org/bugs/show_bug.cgi?id=27235
+ */
+public void test001() {
+	this.runConformTest(
+		new String[] {
+			"X.java",
+			"public class X {\n" + 
+			"	public static void main(String[] args) {\n" + 
+			"		Object o = new X();\n" + 
+			"		String s = \"ESS\";\n" + 
+			"		 o += s;\n" + 
+			"		System.out.println(o);\n" + 
+			"	}\n" + 
+			"	public String toString() {\n" + 
+			"		return \"SUCC\";\n" + 
+			"	}\n" + 
+			"}",
+		},
+		"SUCCESS");
+}
+public static Class testClass() {
+	return AssignmentTest_1_7.class;
+}
+}