### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: model/org/eclipse/jdt/internal/core/ClasspathEntry.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/ClasspathEntry.java,v
retrieving revision 1.107
diff -u -r1.107 ClasspathEntry.java
--- model/org/eclipse/jdt/internal/core/ClasspathEntry.java	16 Oct 2008 14:30:30 -0000	1.107
+++ model/org/eclipse/jdt/internal/core/ClasspathEntry.java	28 Oct 2008 17:06:41 -0000
@@ -1829,17 +1829,9 @@
 			case IClasspathEntry.CPE_LIBRARY :
 				path = ClasspathEntry.resolveDotDot(path);
 				
-				// resolve Class-Path: in manifest
-				IPath[] chainedJars = ClasspathEntry.resolvedChainedLibraries(path);
-				for (int i = 0, length = chainedJars.length; i < length; i++) {
-					IPath chainedJar = chainedJars[i];
-					IJavaModelStatus status = validateLibraryEntry(chainedJar, project, null/*don't check source attachment*/, null/*force computing of entryPathMsg*/);
-					if (!status.isOK()) {
-						if (referredByContainer && status.getCode() == IJavaModelStatusConstants.INVALID_CLASSPATH)
-							continue; // ignore this entry (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=250946 )
-						return status;
-					}
-				}
+				// do not validate entries from Class-Path: in manifest
+				// (these entries are considered optional since the user cannot act on them)
+				// see https://bugs.eclipse.org/bugs/show_bug.cgi?id=252392
 				
 				IJavaModelStatus status = validateLibraryEntry(path, project, checkSourceAttachment ? entry.getSourceAttachmentPath() : null, entryPathMsg);
 				if (!status.isOK())
#P org.eclipse.jdt.core.tests.model
Index: src/org/eclipse/jdt/core/tests/model/ClasspathTests.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/ClasspathTests.java,v
retrieving revision 1.191
diff -u -r1.191 ClasspathTests.java
--- src/org/eclipse/jdt/core/tests/model/ClasspathTests.java	17 Oct 2008 11:01:03 -0000	1.191
+++ src/org/eclipse/jdt/core/tests/model/ClasspathTests.java	28 Oct 2008 17:06:44 -0000
@@ -3111,7 +3111,8 @@
 	}
 }
 /*
- * Ensures that a marker is created for incorrect extra libraries in the Class-Path: clause of a jar
+ * Ensures that a marker is not created for incorrect extra libraries in the Class-Path: clause of a jar
+ * (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=252392 )
  */
 public void testExtraLibraries06() throws Exception {
 	try {
@@ -3125,7 +3126,7 @@
 			JavaCore.VERSION_1_4);
 		assertMarkers(
 			"Unexpected markers",
-			"Project \'P\' is missing required library: \'lib2.jar\'",
+			"",
 			p);
 	} finally {
 		deleteProject("P");
@@ -3184,7 +3185,8 @@
 	}
 }
 /*
- * Ensures that a marker is created for incorrect extra libraries in the Class-Path: clause of an external jar
+ * Ensures that a marker is not created for incorrect extra libraries in the Class-Path: clause of an external jar
+ * (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=252392 )
  */
 public void testExtraLibraries09() throws Exception {
 	try {
@@ -3198,7 +3200,7 @@
 			JavaCore.VERSION_1_4);
 		assertMarkers(
 			"Unexpected markers",
-			"Project \'P\' is missing required library: \'"+ getExternalPath() + "lib2.jar\'",
+			"",
 			p);
 	} finally {
 		deleteProject("P");
@@ -3207,7 +3209,8 @@
 	}
 }
 /*
- * Ensures that a marker is created for incorrect extra libraries in the Class-Path: clause of an external jar
+ * Ensures that a marker is not created for incorrect extra libraries in the Class-Path: clause of an external jar
+ * (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=252392 )
  */
 public void testExtraLibraries10() throws Exception {
 	try {
@@ -3227,7 +3230,7 @@
 		refreshExternalArchives(p);
 		assertMarkers(
 			"Unexpected markers",
-			"Project \'P\' is missing required library: \'"+ getExternalPath() + "lib2.jar\'",
+			"",
 			p);
 	} finally {
 		deleteProject("P");