Index: SourceMapper.java
===================================================================
RCS file: /data/cvs/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/SourceMapper.java,v
retrieving revision 1.69
diff -u -r1.69 SourceMapper.java
--- SourceMapper.java	11 Mar 2003 15:03:55 -0000	1.69
+++ SourceMapper.java	24 Mar 2003 14:23:11 -0000
@@ -295,7 +295,9 @@
 	
 	private void computeAllRootPaths(IType type) {
 		IPackageFragmentRoot root = (IPackageFragmentRoot) type.getPackageFragment().getParent();
-		this.rootPaths = new HashSet();
+		if (this.rootPaths == null) {
+			this.rootPaths = new HashSet();
+		}
 		long time = 0;
 		if (VERBOSE) {
 			System.out.println("compute all root paths for " + root.getElementName()); //$NON-NLS-1$
@@ -315,7 +317,7 @@
 					String entryName = entry.getName();
 					if (!entry.isDirectory()) {
 						int index = entryName.indexOf('/');
-						if (index != -1) {
+						if (index != -1 && Util.isClassFileName(entryName)) {
 							String firstLevelPackageName = entryName.substring(0, index);
 							if (JavaConventions.validatePackageName(firstLevelPackageName).isOK()) {
 								firstLevelPackageNames.add(firstLevelPackageName);