Fix lifetimr

Author: NobodyXu

src/de.rs

@@ -471,7 +471,10 @@ mod tests {
 
     /// Generate subslices, plus stuffing empty slices into the returned
     /// iterator.
-    fn generate_subslices<'a>(mut bytes: &'a [u8], chunk_size: usize) -> impl Iterator<Item = &'a [u8]> {
+    fn generate_subslices<'a>(
+        mut bytes: &'a [u8],
+        chunk_size: usize,
+    ) -> impl Iterator<Item = &'a [u8]> + 'a {
         assert_ne!(chunk_size, 0);
 
         Gn::new_scoped(move |mut s| loop {