The test failed on branch=master, cloud=gce:
test artifacts and logs in: /home/agent/work/.go/src/github.com/cockroachdb/cockroach/artifacts/disk-stalled/log=true_data=true/run_1
	disk_stall.go:129,disk_stall.go:40,test_runner.go:760: unexpected output: /home/agent/work/.go/src/github.com/cockroachdb/cockroach/bin/roachprod run teamcity-2525484-1608188837-29-n1cpu4:1 -- timeout --signal 9 600s env COCKROACH_ENGINE_MAX_SYNC_DURATION_DEFAULT=40ms COCKROACH_LOG_MAX_SYNC_DURATION=40ms ./cockroach start-single-node --insecure --logtostderr=INFO --store {store-dir}/faulty --log-dir {store-dir}/faulty/logs: exit status 20 Flag --logtostderr has been deprecated, use --log instead to specify sinks.stderr.filter.
		Flag --log-dir has been deprecated, use --log instead to specify file-defaults.dir.
		Error: COMMAND_PROBLEM: exit status 7
		(1) COMMAND_PROBLEM
		Wraps: (2) Node 1. Command with error:
		  | ```
		  | timeout --signal 9 600s env COCKROACH_ENGINE_MAX_SYNC_DURATION_DEFAULT=40ms COCKROACH_LOG_MAX_SYNC_DURATION=40ms ./cockroach start-single-node --insecure --logtostderr=INFO --store {store-dir}/faulty --log-dir {store-dir}/faulty/logs
		  | ```
		Wraps: (3) exit status 7
		Error types: (1) errors.Cmd (2) *hintdetail.withDetail (3) *exec.ExitError