From 6ff1c0c52fdf5f25e26ca65631e1b081f67ce1c2 Mon Sep 17 00:00:00 2001
From: Gaming4JC <g4jc@hyperbola.info>
Date: Sat, 4 Jan 2020 22:04:13 -0500
Subject: Bug 1315885 - Part 2: Avoid rethrowing exception in
 CustomElementCallback::Call.

Tag UXP Issue #1344
---
 dom/base/CustomElementRegistry.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'dom/base')

diff --git a/dom/base/CustomElementRegistry.cpp b/dom/base/CustomElementRegistry.cpp
index bd48f3c07..249162c38 100644
--- a/dom/base/CustomElementRegistry.cpp
+++ b/dom/base/CustomElementRegistry.cpp
@@ -55,6 +55,10 @@ CustomElementCallback::Call()
         mArgs.name, mArgs.oldValue, mArgs.newValue, rv);
       break;
   }
+
+  // If callbacks throw exceptions, it'll be handled and reported in
+  // Lifecycle*Callback::Call function.
+  rv.SuppressException();
 }
 
 void
-- 
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