update from main

squeak.js

@@ -39015,7 +39015,7 @@
                 const port = this.ports.get(portNumber);
                 if (!port || !port.input || port.input.connection !== 'open') return false;
                 let received = 0;
-                const chunk = port.receivedData.shift();
+                let chunk = port.receivedData.shift();
                 while (chunk && received < data.length) {
                     const free = data.length - received;
                     if (chunk.length <= free) {