From 7922db3fda2de74ebbe62036bc66ddac1a60e42e Mon Sep 17 00:00:00 2001
From: Paul Irish <paulirish@google.com>
Date: Wed, 17 Oct 2018 13:27:15 -0700
Subject: [PATCH 1/2] core(driver): recover from rejection on
 handleJavaScriptDialog

---
 lighthouse-core/gather/driver.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lighthouse-core/gather/driver.js b/lighthouse-core/gather/driver.js
index 3e7b7ebda902..ba09b87bf5a5 100644
--- a/lighthouse-core/gather/driver.js
+++ b/lighthouse-core/gather/driver.js
@@ -1205,7 +1205,7 @@ class Driver {
       this.sendCommand('Page.handleJavaScriptDialog', {
         accept: true,
         promptText: 'Lighthouse prompt response',
-      });
+      }).catch(err => log.warn('Driver', err));
     });
   }
 }

From 65256ffc39778e58bb82e817ce859b477d58e91e Mon Sep 17 00:00:00 2001
From: Paul Irish <paulirish@google.com>
Date: Wed, 17 Oct 2018 13:38:56 -0700
Subject: [PATCH 2/2] and enable after the event

---
 lighthouse-core/gather/driver.js | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/lighthouse-core/gather/driver.js b/lighthouse-core/gather/driver.js
index ba09b87bf5a5..5da3e6322294 100644
--- a/lighthouse-core/gather/driver.js
+++ b/lighthouse-core/gather/driver.js
@@ -1196,17 +1196,16 @@ class Driver {
    * @return {Promise<void>}
    */
   async dismissJavaScriptDialogs() {
-    await this.sendCommand('Page.enable');
-
     this.on('Page.javascriptDialogOpening', data => {
       log.warn('Driver', `${data.type} dialog opened by the page automatically suppressed.`);
 
-      // rejection intentionally unhandled
       this.sendCommand('Page.handleJavaScriptDialog', {
         accept: true,
         promptText: 'Lighthouse prompt response',
       }).catch(err => log.warn('Driver', err));
     });
+
+    await this.sendCommand('Page.enable');
   }
 }