Prevent loading from cache if commit is nil

lib/gitlab/cache/ci/project_pipeline_status.rb

@@ -47,6 +47,7 @@ module Gitlab
 
         def load_status
           return if loaded?
+          return unless commit
 
           if has_cache?
             load_from_cache
@@ -59,8 +60,6 @@ module Gitlab
         end
 
         def load_from_project
-          return unless commit
-
           self.sha, self.status, self.ref = commit.sha, commit.status, project.default_branch
         end