fix assertion

lib/session/call-session.js

@@ -236,6 +236,7 @@ class CallSession extends Emitter {
 
   async enableBotMode(gather, autoEnable) {
     try {
+      gather.timeout = 0; // background gathers should not timeout
       const t = normalizeJambones(this.logger, [gather]);
       this.backgroundGatherTask = makeTask(this.logger, t[0]);
       this.backgroundGatherTask

lib/tasks/gather.js

@@ -190,7 +190,7 @@ class TaskGather extends Task {
   }
 
   updateTimeout(timeout) {
-    this.logger.info(`TaskGather:updateTimout - updating timeout to ${timeout}`);
+    this.logger.info(`TaskGather:updateTimeout - updating timeout to ${timeout}`);
     this.timeout = timeout;
     this._startTimer();
   }
@@ -317,6 +317,10 @@ class TaskGather extends Task {
 
   _startTimer() {
     if (0 === this.timeout) return;
+    if (this._timeoutTimer) {
+      clearTimeout(this._timeoutTimer);
+      this._timeoutTimer = null;
+    }
     assert(!this._timeoutTimer);
     this.logger.debug(`Gather:_startTimer: timeout ${this.timeout}`);
     this._timeoutTimer = setTimeout(() => this._resolve('timeout'), this.timeout);