From 22e6e485924d192530a7aaede3ee1053586381ba Mon Sep 17 00:00:00 2001
From: Victor Ramirez <victor.ramirez02@estudiant.upf.edu>
Date: Tue, 1 Sep 2020 16:53:22 +0200
Subject: [PATCH] prevent crash from undefined title tag

---
 packages/next/client/head-manager.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/next/client/head-manager.ts b/packages/next/client/head-manager.ts
index 424613f75db21..c42553fd9bd8b 100644
--- a/packages/next/client/head-manager.ts
+++ b/packages/next/client/head-manager.ts
@@ -93,7 +93,9 @@ export default function initHeadManager() {
         let title = ''
         if (titleComponent) {
           const { children } = titleComponent.props
-          title = typeof children === 'string' ? children : children.join('')
+          if (children) {
+            title = typeof children === 'string' ? children : children.join('')
+          }
         }
         if (title !== document.title) document.title = title
         ;['meta', 'base', 'link', 'style', 'script'].forEach((type) => {