From 1e1289b024052ed47c95e145eb34909cb175ce30 Mon Sep 17 00:00:00 2001
From: Claire <claire.github-309c@sitedethib.com>
Date: Mon, 7 Nov 2022 15:43:24 +0100
Subject: [PATCH] Fix crash when external auth provider has no display_name set
 (#19962)

Fixes #19913
---
 app/controllers/auth/omniauth_callbacks_controller.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/app/controllers/auth/omniauth_callbacks_controller.rb b/app/controllers/auth/omniauth_callbacks_controller.rb
index f9cf6d6551..3d7962de56 100644
--- a/app/controllers/auth/omniauth_callbacks_controller.rb
+++ b/app/controllers/auth/omniauth_callbacks_controller.rb
@@ -18,7 +18,8 @@ class Auth::OmniauthCallbacksController < Devise::OmniauthCallbacksController
         )
 
         sign_in_and_redirect @user, event: :authentication
-        set_flash_message(:notice, :success, kind: Devise.omniauth_configs[provider].strategy.display_name.capitalize) if is_navigational_format?
+        label = Devise.omniauth_configs[provider]&.strategy&.display_name.presence || I18n.t("auth.providers.#{provider}", default: provider.to_s.chomp('_oauth2').capitalize)
+        set_flash_message(:notice, :success, kind: label) if is_navigational_format?
       else
         session["devise.#{provider}_data"] = request.env['omniauth.auth']
         redirect_to new_user_registration_url
-- 
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