From 8872b783e662b005082f077690fcf36c735da8e0 Mon Sep 17 00:00:00 2001
From: Kevin Ballard <kevin@sb.org>
Date: Tue, 6 Aug 2013 00:02:42 -0700
Subject: [PATCH] Fix size_hint on Skip

If the upper bound of the wrapped iterator has saturated at
uint::max_value, keep it there. It may actually represent an upper bound
that is higher.
---
 src/libstd/iterator.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/libstd/iterator.rs b/src/libstd/iterator.rs
index 1be398966bbeb..33505213082ca 100644
--- a/src/libstd/iterator.rs
+++ b/src/libstd/iterator.rs
@@ -1266,6 +1266,8 @@ impl<A, T: Iterator<A>> Iterator<A> for Skip<T> {
         let lower = lower.saturating_sub(self.n);
 
         let upper = match upper {
+            // if uint::max_value, leave it there
+            Some(x) if x == uint::max_value => Some(x),
             Some(x) => Some(x.saturating_sub(self.n)),
             None => None
         };