Merge branch 'fix-nplus-query-pipelines' into 'master'

Fix N+1 query in loading pipelines in merge requests

See merge request !10363

app/models/ci/pipeline.rb

@@ -210,7 +210,7 @@ module Ci
     end
 
     def stuck?
-      builds.pending.any?(&:stuck?)
+      builds.pending.includes(:project).any?(&:stuck?)
     end
 
     def retryable?