### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: compiler/org/eclipse/jdt/internal/compiler/ast/EqualExpression.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/ast/EqualExpression.java,v
retrieving revision 1.71
diff -u -r1.71 EqualExpression.java
--- compiler/org/eclipse/jdt/internal/compiler/ast/EqualExpression.java	27 Jun 2008 16:03:56 -0000	1.71
+++ compiler/org/eclipse/jdt/internal/compiler/ast/EqualExpression.java	17 Oct 2008 13:47:34 -0000
@@ -811,7 +811,9 @@
 
 			// check whether comparing identical expressions
 			Binding leftDirect = Expression.getDirectBinding(this.left);
-			if (leftDirect != null && leftDirect == Expression.getDirectBinding(this.right)) {
+			if (leftDirect != null && leftDirect == Expression.getDirectBinding(this.right)
+					&& this.left.resolvedType != TypeBinding.DOUBLE) {
+				// Double.NaN == Double.NaN => false
 				scope.problemReporter().comparingIdenticalExpressions(this);
 			}
 			return this.resolvedType = TypeBinding.BOOLEAN;
#P org.eclipse.jdt.core.tests.compiler
Index: src/org/eclipse/jdt/core/tests/compiler/regression/ProgrammingProblemsTest.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/ProgrammingProblemsTest.java,v
retrieving revision 1.15
diff -u -r1.15 ProgrammingProblemsTest.java
--- src/org/eclipse/jdt/core/tests/compiler/regression/ProgrammingProblemsTest.java	27 Jun 2008 16:04:46 -0000	1.15
+++ src/org/eclipse/jdt/core/tests/compiler/regression/ProgrammingProblemsTest.java	17 Oct 2008 13:47:35 -0000
@@ -26,25 +26,25 @@
 public class ProgrammingProblemsTest extends AbstractRegressionTest {
 
 public ProgrammingProblemsTest(String name) {
-    super(name);
+	super(name);
 }
 
 	// Static initializer to specify tests subset using TESTS_* static variables
-  	// All specified tests which does not belong to the class are skipped...
-  	// Only the highest compliance level is run; add the VM argument
-  	// -Dcompliance=1.4 (for example) to lower it if needed
-  	static {
+	// All specified tests which does not belong to the class are skipped...
+	// Only the highest compliance level is run; add the VM argument
+	// -Dcompliance=1.4 (for example) to lower it if needed
+	static {
 //    	TESTS_NAMES = new String[] { "test001" };
-//    	TESTS_NUMBERS = new int[] { 1 };
+//		TESTS_NUMBERS = new int[] { 39 };
 //  	TESTS_RANGE = new int[] { 1, -1 };
-  	}
+	}
 
 public static Test suite() {
-    return buildAllCompliancesTestSuite(testClass());
+	return buildAllCompliancesTestSuite(testClass());
 }
 
 public static Class testClass() {
-    return ProgrammingProblemsTest.class;
+	return ProgrammingProblemsTest.class;
 }
 
 void runTest(
@@ -1399,4 +1399,46 @@
 			"Zork cannot be resolved to a type\n" +
 			"----------\n");
 }
+//https://bugs.eclipse.org/bugs/show_bug.cgi?id=251227
+public void test0038() {
+	Map options = getCompilerOptions();
+	options.put(CompilerOptions.OPTION_ReportComparingIdentical, CompilerOptions.ERROR);
+	this.runConformTest(
+		new String[] {
+			"X.java",
+			"public class X {\n" +
+			"	public static void main(String[] args) {\n" +
+			"		double d1 = 0.0;\n" +
+			"		System.out.println(d1 == d1);\n" +
+			"	}\n" +
+			"}\n"
+		},
+		"true",
+		null,
+		true,
+		null,
+		options,
+		null);
+}
+//https://bugs.eclipse.org/bugs/show_bug.cgi?id=251227
+public void test0039() {
+	Map options = getCompilerOptions();
+	options.put(CompilerOptions.OPTION_ReportComparingIdentical, CompilerOptions.ERROR);
+	this.runConformTest(
+		new String[] {
+			"X.java",
+			"public class X {\n" +
+			"	public static void main(String[] args) {\n" +
+			"		double d1 = Double.NaN;\n" +
+			"		System.out.println(d1 == d1);\n" +
+			"	}\n" +
+			"}\n"
+		},
+		"false",
+		null,
+		true,
+		null,
+		options,
+		null);
+}
 }
\ No newline at end of file