fix Queue::last

src/datastructures/queue.rs

@@ -265,7 +265,7 @@ impl<T: FromBytes + FromZeroes + AsBytes + Unaligned + Clone + Copy> FilePointer
         res
     }
 
-    pub fn last(self, reader: &impl ReaderTrait, index: u64) -> Option<T> {
+    pub fn last(self, reader: &impl ReaderTrait) -> Option<T> {
         self.get(reader, self.length(reader) - 1)
     }
 

src/tests.rs

@@ -937,6 +937,10 @@ fn queue() {
                 }
             }
 
+            if !root.is_empty(transaction) {
+                assert_eq!(root.last(transaction), Some(U64::from(i - 1)));
+            }
+
             root
         });