From 35e3f12afaceb6f3b3d4ee6b7e7111e3f6dd941a Mon Sep 17 00:00:00 2001
From: Andrey Lushnikov <aslushnikov@gmail.com>
Date: Thu, 31 May 2018 16:53:04 -0700
Subject: [PATCH] fix(workers): swallow errors when auto-detaching from page
 subtargets (#2649)

Page subtargets (e.g. out-of-process iframes and others) sometimes
die before we send the 'detach' command.

This is harmless to us, but we shouldn't have an unhandled promise
rejection in this case.

Example crash: https://cirrus-ci.com/task/4884032470908928
---
 lib/Page.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Page.js b/lib/Page.js
index 345d426ee0b..e4871717b97 100644
--- a/lib/Page.js
+++ b/lib/Page.js
@@ -97,7 +97,7 @@ class Page extends EventEmitter {
         // If we don't detach from service workers, they will never die.
         client.send('Target.detachFromTarget', {
           sessionId: event.sessionId
-        });
+        }).catch(debugError);
         return;
       }
       const session = client._createSession(event.targetInfo.targetId, event.sessionId);