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-rw-r--r--lib/lists.nix5
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/lists.nix b/lib/lists.nix
index 262a529b2b6..eb7e6baf5ed 100644
--- a/lib/lists.nix
+++ b/lib/lists.nix
@@ -165,10 +165,11 @@ in rec {
 
   zipLists = zipListsWith (fst: snd: { inherit fst snd; });
 
-  
-  # Reverse the order of the elements of a list.
+
+  # Reverse the order of the elements of a list.  FIXME: O(n^2)!
   reverseList = fold (e: acc: acc ++ [ e ]) [];
 
+
   # Sort a list based on a comparator function which compares two
   # elements and returns true if the first argument is strictly below
   # the second argument.  The returned list is sorted in an increasing