make "when I receive 'any message'" hat scripts threadsafe (uninterruptable by other messages)

HISTORY.md

@@ -18,7 +18,8 @@
     * saved projects remember the last edited sprite
     * libraries no longer rely on the JSF primitive, project may need to re-import their libraries to run without having to enable JS extensions
     * bulk hide/show arbitrary blocks in the palette via the palette's context menu (instead of the primitive blocks' context menus)
-    * hidden blocks don't appear in search results / keyboard input options 
+    * hidden blocks don't appear in search results / keyboard input options
+    * "when I receive 'any message'" hat scripts are threadsafe (uninterruptable by other messages)
     * retired Leap Motion library, took out Hummingbird library (get the current one from Birdbrain)
     * display blocks with their error messages for custom blocks, thanks, Michael!
     * made scrollbars thinner by default and slightly transparent in flat design mode
@@ -41,6 +42,9 @@
     * German
     * Chinese, thanks, Simon!
 
+### 2021-10-21
+* threads, objects: make "when I receive 'any message'" hat scripts threadsafe (uninterruptable by other messages)
+
 ### 2021-10-20
 * blocks: enable sending green-flag events when switching scenes
 * blocks, objects, gui, threads: removed "When switched to this scene hat block"

snap.html

@@ -17,8 +17,8 @@
         <script src="src/symbols.js?version=2021-03-03"></script>
         <script src="src/widgets.js?version=2021-07-21"></script>
         <script src="src/blocks.js?version=2021-10-20"></script>
-        <script src="src/threads.js?version=2021-10-20"></script>
-        <script src="src/objects.js?version=2021-10-20"></script>
+        <script src="src/threads.js?version=2021-10-21"></script>
+        <script src="src/objects.js?version=2021-10-21"></script>
         <script src="src/scenes.js?version=2021-10-12"></script>
         <script src="src/gui.js?version=2021-10-20"></script>
         <script src="src/paint.js?version=2021-07-05"></script>

src/objects.js

@@ -87,7 +87,7 @@ BlockVisibilityDialogMorph*/
 
 /*jshint esversion: 6*/
 
-modules.objects = '2021-October-20';
+modules.objects = '2021-October-21';
 
 var SpriteMorph;
 var StageMorph;
@@ -8472,7 +8472,8 @@ StageMorph.prototype.fireChangeOfSceneEvent = function (message) {
                     procs.push(this.threads.startProcess(
                         block,
                         morph,
-                        this.isThreadSafe,
+                        this.isThreadSafe || // make "any msg" threadsafe
+                            block.inputs()[0].evaluate() instanceof Array,
                         null, // exportResult (bool)
                         null, // callback
                         null, // isClicked

src/threads.js

@@ -64,7 +64,7 @@ SnapExtensions, AlignmentMorph, TextMorph, Cloud*/
 
 /*jshint esversion: 6*/
 
-modules.threads = '2021-October-20';
+modules.threads = '2021-October-21';
 
 var ThreadManager;
 var Process;
@@ -3714,7 +3714,8 @@ Process.prototype.doBroadcast = function (message) {
                         procs.push(stage.threads.startProcess(
                             block,
                             morph,
-                            stage.isThreadSafe,
+                            stage.isThreadSafe || // make "any msg" threadsafe
+                                block.inputs()[0].evaluate() instanceof Array,
                             null, // exportResult (bool)
                             null, // callback
                             null, // isClicked