### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: compiler/org/eclipse/jdt/internal/compiler/lookup/Scope.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/lookup/Scope.java,v
retrieving revision 1.352
diff -u -r1.352 Scope.java
--- compiler/org/eclipse/jdt/internal/compiler/lookup/Scope.java	25 Mar 2009 20:17:40 -0000	1.352
+++ compiler/org/eclipse/jdt/internal/compiler/lookup/Scope.java	27 Mar 2009 18:28:16 -0000
@@ -834,7 +834,7 @@
 				if (compatibleMethod != null) {
 					if (compatibleMethod.isValidBinding()) {
 						if (concreteMatch != null && concreteMatch.declaringClass.findSuperTypeOriginatingFrom(compatibleMethod.declaringClass) != null)
-							if (environment().methodVerifier().isParameterSubsignature(concreteMatch, compatibleMethod))
+							if (environment().methodVerifier().isParameterSubsignature(concreteMatch.original(), compatibleMethod.original()))
 								continue; // can skip this method since concreteMatch overrides it
 						if (candidatesCount == 0) {
 							candidates = new MethodBinding[foundSize - startFoundSize + 1];
#P org.eclipse.jdt.core.tests.compiler
Index: src/org/eclipse/jdt/core/tests/compiler/regression/AmbiguousMethodTest.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/AmbiguousMethodTest.java,v
retrieving revision 1.63
diff -u -r1.63 AmbiguousMethodTest.java
--- src/org/eclipse/jdt/core/tests/compiler/regression/AmbiguousMethodTest.java	19 Mar 2009 14:20:30 -0000	1.63
+++ src/org/eclipse/jdt/core/tests/compiler/regression/AmbiguousMethodTest.java	27 Mar 2009 18:28:18 -0000
@@ -3206,4 +3206,23 @@
 		"----------\n"
 	);
 }
+
+//https://bugs.eclipse.org/bugs/show_bug.cgi?id=270194
+public void test077() {
+	this.runConformTest(
+		new String[] {
+			"X.java",
+			"abstract class X implements I {\n" +
+			"	public <A extends J<A, D>, D extends J<A, D>> A method(A arg) { return null; }\n" +
+			"	void test(Y<String> c) { method(c); }\n" +
+			"}\n" +
+			"interface I {\n" +
+			"	<A extends J<A,D>, D extends J<A,D>> A method(A arg);\n" +
+			"}\n" +
+			"interface J<A extends J<A,D>, D extends J<A,D>> {}\n" +
+			"class Y<E> implements J<Y<E>, Y<E>> {}"
+		},
+		""
+	);
+}
 }