Merge branch 'sh-handle-orphaned-deploy-keys' into 'master'

Gracefully handle orphaned write deploy keys in /internal/post_receive

Closes #41466

See merge request gitlab-org/gitlab-ce!16127

1 files changed, 6 insertions, 3 deletions

diff --git a/lib/api/internal.rb b/lib/api/internal.rb
index ccaaeca10d4..79b302aae70 100644
--- a/lib/api/internal.rb
+++ b/lib/api/internal.rb
@@ -190,9 +190,12 @@ module API
 
         project = Gitlab::GlRepository.parse(params[:gl_repository]).first
         user = identify(params[:identifier])
-        redirect_message = Gitlab::Checks::ProjectMoved.fetch_redirect_message(user.id, project.id)
-        if redirect_message
-          output[:redirected_message] = redirect_message
+
+        # A user is not guaranteed to be returned; an orphaned write deploy
+        # key could be used
+        if user
+          redirect_message = Gitlab::Checks::ProjectMoved.fetch_redirect_message(user.id, project.id)
+          output[:redirected_message] = redirect_message if redirect_message
         end
 
         output