trace reading: only bind to the first tracingComplete event.

GoogleChrome · Jul 29, 2016 · fe634e7 · fe634e7
1 parent e8bb926
commit fe634e7
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lighthouse-core/gather/drivers/driver.js b/lighthouse-core/gather/drivers/driver.js
@@ -255,7 +255,7 @@ class Driver {
   endTrace() {
     return new Promise((resolve, reject) => {
       // When the tracing has ended this will fire with a stream handle.
-      this.on('Tracing.tracingComplete', streamHandle => {
+      this.once('Tracing.tracingComplete', streamHandle => {
         this._readTraceFromStream(streamHandle)
             .then(traceContents => resolve(traceContents));
       });