Fix the end split of ChunksProducer too

Author: cuviper

src/slice/mod.rs

@@ -571,7 +571,7 @@ impl<'data, T: 'data + Sync> Producer for ChunksProducer<'data, T> {
     }
 
     fn split_at(self, index: usize) -> (Self, Self) {
-        let elem_index = index * self.chunk_size;
+        let elem_index = cmp::min(index * self.chunk_size, self.slice.len());
         let (left, right) = self.slice.split_at(elem_index);
         (
             ChunksProducer {