diff --git a/src/diff.rs b/src/diff.rs
index d584e6a..a5edf9d 100644
--- a/src/diff.rs
+++ b/src/diff.rs
@@ -200,7 +200,7 @@ fn qsufsort(I: &mut [isize], V: &mut [isize], old: &[u8]) {
         }
         h += h;
     }
-    for (i, v) in V[0..old.len() + 1].iter().copied().enumerate() {
+    for (i, v) in V[0..=old.len()].iter().copied().enumerate() {
         I[usz(v)] = i as isize;
     }
 }
diff --git a/src/patch.rs b/src/patch.rs
index a49e4fd..35a1f78 100644
--- a/src/patch.rs
+++ b/src/patch.rs
@@ -27,7 +27,6 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-use std::convert::TryInto;
 use std::io;
 use std::io::Read;