Add error handling for Yjs operations

adapters/vim/bridge.ts

@@ -42,10 +42,16 @@ function connect(roomName: string) {
       case "sync":
       case "update": {
         if (!doc) break;
+        try {
           suppressLocal = true;
           Y.applyUpdate(doc, new Uint8Array(msg.data));
           suppressLocal = false;
           send({ type: "content", text: text?.toString() || "" });
+        } catch (err) {
+          suppressLocal = false;
+          console.error("failed to apply yjs update:", err);
+          send({ type: "error", message: "failed to apply remote update" });
+        }
         break;
       }
       case "peers": {

src/session.ts

@@ -28,6 +28,7 @@ export class Session {
   }
 
   applyUpdate(update: Uint8Array, from: Client) {
+    try {
       Y.applyUpdate(this.doc, update);
       // broadcast to others
       for (const client of this.clients) {
@@ -35,6 +36,15 @@ export class Session {
           client.ws.send(encode({ type: "update", data: Array.from(update) }));
         }
       }
+    } catch (err) {
+      console.error(`failed to apply update in session ${this.name}:`, err);
+      // optionally notify the client that sent the bad update
+      try {
+        from.ws.send(encode({ type: "error", message: "invalid update" } as any));
+      } catch {
+        // ignore send errors
+      }
+    }
   }
 
   broadcastPeerCount() {