Bug 162655 [Undo] [IDE] - Undoing a delete should check for existence of resources to be restored
N20061027. - I deleted two projects (along with their content). I read the warning that undo delete cannot restore the content and said "OK." - Then I checked out those same projects from HEAD. - Then I selected "Undo Delete Resources." This overwrote my code with empty projects. I think that "Undo Delete Resources" should become invalid if the resources exist again, because you'll end up replacing content without keeping a backup.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/DeleteResourcesOperation.java
}
		return status;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * Map redo status to resource deletion status.
	 * 
	 * @see org.eclipse.ui.ide.undo.AbstractWorkspaceOperation#computeRedoableStatus(org.eclipse.core.runtime.IProgressMonitor)
	 */
	public IStatus computeRedoableStatus(IProgressMonitor monitor) {
		IStatus status = super.computeRedoableStatus(monitor);
		if (status.isOK()) {
			status = computeDeleteStatus();
		}
		return status;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.ide.undo.AbstractWorkspaceOperation#appendDescriptiveText(java.lang.StringBuffer)
	 */
	protected void appendDescriptiveText(StringBuffer text) {
		super.appendDescriptiveText(text);
		text.append(" deleteContent: "); 
		text.append(deleteContent);
		text.append('\'');
	}
}