+(defun ls-lisp-sanitize (file-alist)
+ "Sanitize the elements in FILE-ALIST.
+Fixes any elements in the alist for directory entries whose file
+attributes are nil (meaning that `file-attributes' failed for
+them). This is known to happen for some network shares, in
+particular for the \"..\" directory entry.
+
+If the \"..\" directory entry has nil attributes, the attributes
+are copied from the \".\" entry, if they are non-nil. Otherwise,
+the offending element is removed from the list, as are any
+elements for other directory entries with nil attributes."
+ (if (and (null (cdr (assoc ".." file-alist)))
+ (cdr (assoc "." file-alist)))
+ (setcdr (assoc ".." file-alist) (cdr (assoc "." file-alist))))
+ (rassq-delete-all nil file-alist))
+