diff options
| -rw-r--r-- | src/libcore/iter.rs | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/libcore/iter.rs b/src/libcore/iter.rs index edc67fbf8c9..55bd7c17245 100644 --- a/src/libcore/iter.rs +++ b/src/libcore/iter.rs @@ -1130,7 +1130,11 @@ impl<I> RandomAccessIterator for Rev<I> where I: DoubleEndedIterator + RandomAcc #[inline] fn idx(&mut self, index: usize) -> Option<<I as Iterator>::Item> { let amt = self.indexable(); - self.iter.idx(amt - index - 1) + if amt > index { + self.iter.idx(amt - index - 1) + } else { + None + } } } |