### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: compiler/org/eclipse/jdt/internal/compiler/ast/Argument.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/ast/Argument.java,v
retrieving revision 1.64
diff -u -r1.64 Argument.java
--- compiler/org/eclipse/jdt/internal/compiler/ast/Argument.java	8 Jan 2009 20:51:05 -0000	1.64
+++ compiler/org/eclipse/jdt/internal/compiler/ast/Argument.java	3 Nov 2009 08:54:39 -0000
@@ -54,6 +54,10 @@
 
 		if (this.binding == null) {
 			this.binding = new LocalVariableBinding(this, typeBinding, this.modifiers, true);
+		} else if (!this.binding.type.isValidBinding()) {
+			if (scope.referenceMethod().binding != null) {
+				scope.referenceMethod().binding.tagBits |= TagBits.HasUnresolvedArguments;
+			}
 		}
 		scope.addLocalVariable(this.binding);
 		resolveAnnotations(scope, this.annotations, this.binding);
Index: compiler/org/eclipse/jdt/internal/compiler/ast/MethodDeclaration.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/ast/MethodDeclaration.java,v
retrieving revision 1.75
diff -u -r1.75 MethodDeclaration.java
--- compiler/org/eclipse/jdt/internal/compiler/ast/MethodDeclaration.java	22 Sep 2009 14:56:46 -0000	1.75
+++ compiler/org/eclipse/jdt/internal/compiler/ast/MethodDeclaration.java	3 Nov 2009 08:54:40 -0000
@@ -149,7 +149,8 @@
 			if (complianceLevel < ClassFileConstants.JDK1_5) break checkOverride;
 			int bindingModifiers = this.binding.modifiers;
 			boolean hasOverrideAnnotation = (this.binding.tagBits & TagBits.AnnotationOverride) != 0;
-			if (hasOverrideAnnotation) {
+			boolean hasUnresolvedArguments = (this.binding.tagBits & TagBits.HasUnresolvedArguments) != 0;
+			if (hasOverrideAnnotation  && !hasUnresolvedArguments) {
 				// no static method is considered overriding
 				if ((bindingModifiers & (ClassFileConstants.AccStatic|ExtraCompilerModifiers.AccOverriding)) == ExtraCompilerModifiers.AccOverriding)
 					break checkOverride;
Index: compiler/org/eclipse/jdt/internal/compiler/lookup/TagBits.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/lookup/TagBits.java,v
retrieving revision 1.39
diff -u -r1.39 TagBits.java
--- compiler/org/eclipse/jdt/internal/compiler/lookup/TagBits.java	18 Sep 2009 14:08:13 -0000	1.39
+++ compiler/org/eclipse/jdt/internal/compiler/lookup/TagBits.java	3 Nov 2009 08:54:40 -0000
@@ -33,6 +33,9 @@
 	// for method
 	long HasUncheckedTypeArgumentForBoundCheck = ASTNode.Bit9;
 	
+	// set when method has argument(s) that couldn't be resolved
+	long HasUnresolvedArguments = ASTNode.Bit10;
+	
 	// for the type cycle hierarchy check used by ClassScope
 	long BeginHierarchyCheck = ASTNode.Bit9;  // type
 	long EndHierarchyCheck = ASTNode.Bit10; // type
#P org.eclipse.jdt.core.tests.compiler
Index: src/org/eclipse/jdt/core/tests/compiler/regression/AnnotationTest.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/AnnotationTest.java,v
retrieving revision 1.207
diff -u -r1.207 AnnotationTest.java
--- src/org/eclipse/jdt/core/tests/compiler/regression/AnnotationTest.java	5 Oct 2009 17:46:26 -0000	1.207
+++ src/org/eclipse/jdt/core/tests/compiler/regression/AnnotationTest.java	3 Nov 2009 08:54:47 -0000
@@ -9249,4 +9249,34 @@
 		"",
 		JavacTestOptions.SKIP);
 }
+// https://bugs.eclipse.org/bugs/show_bug.cgi?id=293777
+// To verify that a misleading warning against @Override annotation is not
+// issued in case the method signature has not been resolved properly.
+public void test278() {
+	String testString [] = new String[] {
+			"A.java",
+			"import javax.swing.JComponent;\n" +
+			"public class A extends JComponent {\n" +
+			"   @Override\n" +
+			"	protected void paintComponent(Graphics g) {" +
+			"   }\n" +
+			"}\n"
+			};
+	String expectedOutput =
+		"----------\n" +
+		"1. WARNING in A.java (at line 2)\n" +
+		"	public class A extends JComponent {\n" +
+		"	             ^\n" +
+		"The serializable class A does not declare a static final serialVersionUID field of type long\n" +
+		"----------\n" +
+		"2. ERROR in A.java (at line 4)\n" +
+		"	protected void paintComponent(Graphics g) {   }\n" +
+		"	                              ^^^^^^^^\n" +
+		"Graphics cannot be resolved to a type\n" +
+		"----------\n";
+	this.runNegativeTest(
+			testString,
+			expectedOutput,
+			JavacTestOptions.Excuse.EclipseWarningConfiguredAsError);
+}
 }