### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: model/org/eclipse/jdt/internal/core/DeltaProcessor.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/DeltaProcessor.java,v
retrieving revision 1.311
diff -u -r1.311 DeltaProcessor.java
--- model/org/eclipse/jdt/internal/core/DeltaProcessor.java	16 Jan 2008 16:59:47 -0000	1.311
+++ model/org/eclipse/jdt/internal/core/DeltaProcessor.java	29 Jan 2008 16:32:04 -0000
@@ -1850,10 +1850,14 @@
 							}
 							
 							// add late coming elements to refresh (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=212769 )
-							if (elementsToRefresh == null)
+							if (elementsToRefresh == null) {
 								elementsToRefresh = this.state.removeExternalElementsToRefresh();
-							else
-								elementsToRefresh.addAll(this.state.removeExternalElementsToRefresh());
+							} else {
+								HashSet existingElements = this.state.removeExternalElementsToRefresh();
+								if (existingElements != null) {
+									elementsToRefresh.addAll(existingElements);
+								}
+							}
 							
 							// generate external archive change deltas
 							if (elementsToRefresh != null) {
#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 1.167
diff -u -r1.167 ClasspathTests.java
--- src/org/eclipse/jdt/core/tests/model/ClasspathTests.java	28 Jan 2008 16:58:28 -0000	1.167
+++ src/org/eclipse/jdt/core/tests/model/ClasspathTests.java	29 Jan 2008 16:32:08 -0000
@@ -33,9 +33,13 @@
 import org.eclipse.core.resources.IncrementalProjectBuilder;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.ILog;
+import org.eclipse.core.runtime.ILogListener;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Path;
+import org.eclipse.core.runtime.Platform;
 import org.eclipse.jdt.core.IAccessRule;
 import org.eclipse.jdt.core.IClasspathAttribute;
 import org.eclipse.jdt.core.IClasspathContainer;
@@ -3450,6 +3454,36 @@
 		deleteProject("P");
 	}
 }
+/*
+ * Ensures that no error is reported when deleting a project after setting its raw classpath with no resource change.
+ * (regression test for https://bugs.eclipse.org/bugs/show_bug.cgi?id=216895 )
+ */
+public void testNoResourceChange06() throws CoreException {
+	ILogListener listener = new ILogListener(){
+		private StringBuffer buffer = new StringBuffer();
+		public void logging(IStatus status, String plugin) {
+			buffer.append(status);
+			buffer.append('\n');
+		}
+		public String toString() {
+			return this.buffer.toString();
+		}
+	};
+	try {
+		Platform.addLogListener(listener);
+		IJavaProject project = createJavaProject("P", new String[] {"src1"}, "bin");
+		IClasspathEntry[] newClasspath = createClasspath("P", new String[] {"/P/src2", ""});
+		project.setRawClasspath(newClasspath, false/*cannot modify resources*/, null/*no progress*/);
+		deleteProject("P");
+		assertSourceEquals(
+			"Unexpected error logged", 
+			"",
+			listener.toString());
+	} finally {
+		Platform.removeLogListener(listener);
+		deleteProject("P");
+	}
+}
 /**
  * Ensures that a duplicate entry created by editing the .classpath is detected.
  * (regression test for bug 24498 Duplicate entries on classpath cause CP marker to no longer refresh)