Allow to have undefined or null as argumento to RoaringBitmap

Author: GuillaumeGomez

src/librustdoc/html/static/js/search.js

@@ -1089,6 +1089,14 @@ class VlqHexDecoder {
 class RoaringBitmap {
     /** @param {string} str */
     constructor(str) {
+        this.keys = [];
+        this.cardinalities = [];
+        this.containers = [];
+
+        if (str === undefined || str === null) {
+            return;
+        }
+
         // https://github.com/RoaringBitmap/RoaringFormatSpec
         //
         // Roaring bitmaps are used for flags that can be kept in their
@@ -1113,15 +1121,12 @@ class RoaringBitmap {
         } else {
             is_run = new Uint8Array();
         }
-        this.keys = [];
-        this.cardinalities = [];
         for (let j = 0; j < size; ++j) {
             this.keys.push(u8array[i] | (u8array[i + 1] << 8));
             i += 2;
             this.cardinalities.push((u8array[i] | (u8array[i + 1] << 8)) + 1);
             i += 2;
         }
-        this.containers = [];
         let offsets = null;
         if (!has_runs || this.keys.length >= 4) {
             offsets = [];