Fix bug in footnote fuzzing

fuzz/src/lib.rs

@@ -752,7 +752,7 @@ pub fn normalize(events: Vec<Event<'_>>) -> Vec<Event<'_>> {
     let mut footnotes: HashMap<String, Vec<Event<'_>>> = HashMap::new();
     let mut in_footnote: Vec<usize> = Vec::new();
     let mut normalized = Vec::with_capacity(events.len());
-    for (i, event) in events.into_iter().enumerate() {
+    for event in events.into_iter() {
         match (normalized.last_mut(), &event) {
             // Join adjacent text and HTML events.
             (Some(Event::Text(prev)), Event::Text(next)) => *prev = format!("{prev}{next}").into(),
@@ -787,7 +787,7 @@ pub fn normalize(events: Vec<Event<'_>>) -> Vec<Event<'_>> {
             }
 
             (_, Event::Start(Tag::FootnoteDefinition(..))) => {
-                in_footnote.push(i);
+                in_footnote.push(normalized.len());
                 normalized.push(event);
             }
 
@@ -797,7 +797,7 @@ pub fn normalize(events: Vec<Event<'_>>) -> Vec<Event<'_>> {
                 let footnote = normalized.split_off(j);
                 let name = match &footnote[0] {
                     Event::Start(Tag::FootnoteDefinition(name)) => name.clone(),
-                    _ => panic!("this should not be possible"),
+                    _ => panic!("this should not be possible {footnote:?}", footnote = footnote),
                 };
                 footnotes.insert(name.to_string(), footnote);
             }