No more QMP deadlocks? It's more likely than you think.

src/QMPClient.ts

@@ -52,6 +52,7 @@ export default class QMPClient extends EventEmitter {
         try {
             msg = JSON.parse(msgraw);
         } catch {
+            this.emit("qmpreturn", '');
             return;
         }
 
@@ -150,4 +151,4 @@ export default class QMPClient extends EventEmitter {
             res(await this.execute({execute: "human-monitor-command", arguments: {"command-line": command}}));
         });
     }
-}
+}