fix

Author: yotamofek

src/librustdoc/html/render/search_index.rs

@@ -565,7 +565,7 @@ impl SerializedSearchIndex {
                     Some(self_generic_inverted_index) => self_generic_inverted_index,
                     None => self.generic_inverted_index.push_mut(Vec::new()),
                 };
-                self_generic_inverted_index.resize(size, Vec::new());
+                self_generic_inverted_index.resize(size + 1, Vec::new());
                 self_generic_inverted_index[size].extend(
                     other_list
                         .iter()
@@ -1875,11 +1875,11 @@ pub(crate) fn build_index(
                         .inverted_function_inputs_index
                 } else {
                     let generic_id = usize::try_from(-index).unwrap() - 1;
-                    serialized_index.generic_inverted_index.resize(generic_id, Vec::new());
+                    serialized_index.generic_inverted_index.resize(generic_id + 1, Vec::new());
                     &mut serialized_index.generic_inverted_index[generic_id]
                 };
                 // FIXME(yotamofek): last item should have capacity of 1
-                postings.resize(search_type_size, Vec::new());
+                postings.resize(search_type_size + 1, Vec::new());
                 let posting = &mut postings[search_type_size];
                 if posting.last() != Some(&(new_entry_id as u32)) {
                     posting.push(new_entry_id as u32);
@@ -1900,7 +1900,7 @@ pub(crate) fn build_index(
                     &mut serialized_index.generic_inverted_index[generic_id]
                 };
                 // FIXME(yotamofek): last item should have capacity of 1
-                postings.resize(search_type_size, Vec::new());
+                postings.resize(search_type_size + 1, Vec::new());
                 let posting = &mut postings[search_type_size];
                 if posting.last() != Some(&(new_entry_id as u32)) {
                     posting.push(new_entry_id as u32);