From c73fc90033b3c7c3689faa5fdfc45ebbe93072c0 Mon Sep 17 00:00:00 2001
From: jmoenig <jens@moenig.org>
Date: Thu, 30 Sep 2021 14:04:59 +0200
Subject: [PATCH] restricted inter-scene messages to text and numbers

---
 HISTORY.md     | 1 +
 src/threads.js | 1 +
 2 files changed, 2 insertions(+)

diff --git a/HISTORY.md b/HISTORY.md
index 0c7e2033..b7899c50 100755
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -38,6 +38,7 @@
 ### 2021-09-30
 * blocks, objects, threads, gui: optional upvars referencing event data for message, key and scene hat blocks
 * blocks: disabled dropping reporters onto message hat block input slots
+* threads: restricted inter-scene messages to text and numbers
 
 ### 2021-09-29
 * objects, blocks: refactored experimental "When I receive message" hat block
diff --git a/src/threads.js b/src/threads.js
index 7bcbda20..55b5d451 100644
--- a/src/threads.js
+++ b/src/threads.js
@@ -4730,6 +4730,7 @@ Process.prototype.doSwitchToScene = function (id, transmission) {
         message = transmission.at(1),
         ide, scenes, num, scene;
     this.assertAlive(rcvr);
+    this.assertType(message, ['text', 'number']);
     if (this.readyToTerminate || this.topBlock.selector === 'receiveOnScene') {
         // let the user press "stop" or "esc",
         // prevent "when this scene starts" hat blocks from directly