fixed an empty-slot detection issue

fixed an empty-slot detection issue (reported in the forums), but left it commented out for now, until researching the consequences ;-)

HISTORY.md

@@ -21,6 +21,7 @@
 ### 2020-10-07
 * byob: added "settings" button to input slot dialog
 * symbols: added "gearPartial" icon
+* blocks: fixed an empty-slot detection issue (reported in the forums), but left it commented out for now, until researching the consequences ;-)
 
 ### 2020-10-06
 * blocks: disable blurred shadows inside input slots if the hidden "blurred shadows" setting is turned off

snap.html

@@ -8,7 +8,7 @@
         <script src="src/morphic.js?version=2020-09-12"></script>
         <script src="src/symbols.js?version=2020-10-07"></script>
         <script src="src/widgets.js?version=2020-10-06"></script>
-        <script src="src/blocks.js?version=2020-10-06"></script>
+        <script src="src/blocks.js?version=2020-10-07"></script>
         <script src="src/threads.js?version=2020-10-05"></script>
         <script src="src/objects.js?version=2020-10-06"></script>
         <script src="src/gui.js?version=2020-10-06"></script>

src/blocks.js

@@ -158,7 +158,7 @@ CustomCommandBlockMorph, SymbolMorph, ToggleButtonMorph, DialMorph*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.blocks = '2020-October-06';
+modules.blocks = '2020-October-07';
 
 var SyntaxElementMorph;
 var BlockMorph;
@@ -388,6 +388,9 @@ SyntaxElementMorph.prototype.allEmptySlots = function () {
     // to empty input slots
     var empty = [];
     if (!(this instanceof RingMorph) &&
+            // disregard custom C-slots, because they should be treated as
+            // rings. Commented out for now...
+            // !(this instanceof CSlotMorph && !this.isStatic) &&
             (this.selector !== 'reportJSFunction')) {
         this.children.forEach(morph => {
             if (morph.isEmptySlot && morph.isEmptySlot()) {