Bug 267173 [Linked Resources] Data loss when replacing one linked resource with another using drag and drop
Build ID: HEAD Steps To Reproduce: I've got a Group with some links to folders. If I drag and drop a linked folder from another workspace path, into the group, I get the dialog saying: "project/group/linked_folder" already exists. Do you wish to overwrite? Folder contents will be merged existing files will be overwritten. In my case I had selected a bunch of linked resources to drag into the group, (some of which are identical to the links already in the group). So I pressed "Yes To All". The result is an error: "Resource is out of sync with the filesystem: ..." The move operation has actually tried to replace a file with itself, and this fails (and the resulting file is empty...). I find this completely counter-intuitive. If I'm replacing a linked resource with another, I don't want a recursive merge. I want to replace the link, just like aliases in a filesystem...
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/WorkspaceUndoUtil.java
*            user if necessary. When this parameter is not
	 *            <code>null</code>, it contains an adapter for the
	 *            org.eclipse.swt.widgets.Shell.class
	 * @return an array of resources that were created
	 * @throws CoreException
	 *             propagates any CoreExceptions thrown from the resources API
	 */
	static IResource[] recreate(ResourceDescription[] resourcesToRecreate,
			IProgressMonitor monitor, IAdaptable uiInfo) throws CoreException {
		final List exceptions = new ArrayList();
		IResource[] resourcesToReturn = new IResource[resourcesToRecreate.length];
		monitor.beginTask("", resourcesToRecreate.length); 
		monitor
				.setTaskName(UndoMessages.AbstractResourcesOperation_CreateResourcesProgress);
		try {
			for (int i = 0; i < resourcesToRecreate.length; ++i) {
				if (monitor.isCanceled()) {
					throw new OperationCanceledException();
				}
				try {
					resourcesToReturn[i] = resourcesToRecreate[i]
							.createResource(new SubProgressMonitor(monitor, 1));
				} catch (CoreException e) {
					exceptions.add(e);
				}
			}
			IStatus result = WorkspaceUndoUtil.createResult(exceptions);
			if (!result.isOK()) {
				throw new CoreException(result);
			}