fixed binding an unbound context to a sprite

e.g. when using JOIN blocks with variable references

HISTORY.md

@@ -5,11 +5,15 @@
 * **New Features:**
 * **Notable Changes:**
 * **Notable Fixes:**
+    * fixed binding an unbound context to a sprite (e.g. when using JOIN blocks)
+    * fixed loading the Chinese translation, thanks, @moodykeke
 * **Documentation Updates:**
 * **Translation Updates:**
 
 ### 2022-01-17
 * new dev version
+* fixed loading the Chinese translation, thanks, @moodykeke
+* threads: fixed binding an unbound context to a sprite (e.g. when using JOIN blocks)
 
 ## 7.0.5:
 * **New Features:**

snap.html

@@ -17,7 +17,7 @@
         <script src="src/symbols.js?version=2021-03-03"></script>
         <script src="src/widgets.js?version=2021-17-09"></script>
         <script src="src/blocks.js?version=2022-01-07"></script>
-        <script src="src/threads.js?version=2022-01-13"></script>
+        <script src="src/threads.js?version=2022-01-17"></script>
         <script src="src/objects.js?version=2022-01-03"></script>
         <script src="src/scenes.js?version=2021-11-24"></script>
         <script src="src/gui.js?version=2022-01-17"></script>

src/threads.js

@@ -64,7 +64,7 @@ SnapExtensions, AlignmentMorph, TextMorph, Cloud, HatBlockMorph*/
 
 /*jshint esversion: 6*/
 
-modules.threads = '2022-January-13';
+modules.threads = '2022-January-17';
 
 var ThreadManager;
 var Process;
@@ -4761,7 +4761,7 @@ Process.prototype.goToLayer = function (name) {
 
 // Process scene primitives
 
-Process.prototype.doSwitchToScene = function (id, transmission) { // +++
+Process.prototype.doSwitchToScene = function (id, transmission) {
     var rcvr = this.blockReceiver(),
         idx = 0,
         message = this.inputOption(transmission.at(1)),
@@ -5886,18 +5886,20 @@ Process.prototype.reportContextFor = function (context, otherObj) {
         rootVars;
 
     result.receiver = otherObj;
-    if (result.outerContext) {
-        result.outerContext = copy(result.outerContext);
-        result.outerContext.variables = copy(result.outerContext.variables);
-        result.outerContext.receiver = otherObj;
-        if (result.outerContext.variables.parentFrame) {
-            rootVars = result.outerContext.variables.parentFrame;
-            receiverVars = copy(otherObj.variables);
-            receiverVars.parentFrame = rootVars;
-            result.outerContext.variables.parentFrame = receiverVars;
-        } else {
-            result.outerContext.variables.parentFrame = otherObj.variables;
-        }
+    if (!result.outerContext) {
+        result.outerContext = new Context();
+        result.variables.parentFrame = result.outerContext.variables;
+    }
+    result.outerContext = copy(result.outerContext);
+    result.outerContext.variables = copy(result.outerContext.variables);
+    result.outerContext.receiver = otherObj;
+    if (result.outerContext.variables.parentFrame) {
+        rootVars = result.outerContext.variables.parentFrame;
+        receiverVars = copy(otherObj.variables);
+        receiverVars.parentFrame = rootVars;
+        result.outerContext.variables.parentFrame = receiverVars;
+    } else {
+        result.outerContext.variables.parentFrame = otherObj.variables;
     }
     return result;
 };