fixed naming a custom block category to a JS property such as "constr…

…uctor"

HISTORY.md

@@ -4,6 +4,10 @@
 * **Notable Fixes:**
     * only bind rings that replace list items to the list as environment if they are referred to by a non-numerical index (OOP 2.0)
     * fixed #3403 editing a primitive and changing a default input
+    * fixed naming a custom block category to a JS property such as "constructor"
+
+### 2024-09-13
+* objects: fixed naming a custom block category to a JS property such as "constructor"
 
 ### 2024-09-12
 * threads: only bind rings replaced in a list to the list as environment if they are referred to by a non-numerical index (OOP 2.0)

snap.html

@@ -18,7 +18,7 @@
         <script src="src/widgets.js?version=2024-07-24"></script>
         <script src="src/blocks.js?version=2024-10-11"></script>
         <script src="src/threads.js?version=2024-10-12"></script>
-        <script src="src/objects.js?version=2024-10-12"></script>
+        <script src="src/objects.js?version=2024-10-13"></script>
         <script src="src/scenes.js?version=2024-05-28"></script>
         <script src="src/gui.js?version=2024-10-12"></script>
         <script src="src/paint.js?version=2023-05-24"></script>

src/objects.js

@@ -96,7 +96,7 @@ CustomBlockDefinition, exportEmbroidery*/
 
 /*jshint esversion: 11*/
 
-modules.objects = '2024-October-12';
+modules.objects = '2024-October-13';
 
 var SpriteMorph;
 var StageMorph;
@@ -4145,7 +4145,9 @@ SpriteMorph.prototype.makeBlock = function () {
 };
 
 SpriteMorph.prototype.getPrimitiveTemplates = function (category) {
-    var blocks = this.primitivesCache[category];
+    var blocks = Object.hasOwn(this.primitivesCache, category) ?
+            this.primitivesCache[category]
+            : null;
     if (!blocks) {
         blocks = this.blockTemplates(category);
         if (this.isCachingPrimitives) {