in app/models/commit.rb [234:244]
def config_processor
@config_processor ||= GitlabCiYamlProcessor.new(push_data[:ci_yaml_file] || project.generated_yaml_config)
rescue GitlabCiYamlProcessor::ValidationError => e
save_yaml_error(e.message)
nil
rescue Exception => e
logger.error e.message + "\n" + e.backtrace.join("\n")
save_yaml_error("Undefined yaml error")
nil
end