The test failed on branch=release-22.1, cloud=gce:
test artifacts and logs in: /artifacts/version/mixed/nodes=5/run_1
	monitor.go:127,version.go:214,version.go:227,test_runner.go:883: monitor failure: monitor command failure: unexpected node event: 3: dead (exit status 137)
		(1) attached stack trace
		  -- stack trace:
		  | main.(*monitorImpl).WaitE
		  | 	main/pkg/cmd/roachtest/monitor.go:115
		  | main.(*monitorImpl).Wait
		  | 	main/pkg/cmd/roachtest/monitor.go:123
		  | github.com/cockroachdb/cockroach/pkg/cmd/roachtest/tests.registerVersion.func1
		  | 	github.com/cockroachdb/cockroach/pkg/cmd/roachtest/tests/version.go:214
		  | github.com/cockroachdb/cockroach/pkg/cmd/roachtest/tests.registerVersion.func2
		  | 	github.com/cockroachdb/cockroach/pkg/cmd/roachtest/tests/version.go:227
		  | [...repeated from below...]
		Wraps: (2) monitor failure
		Wraps: (3) attached stack trace
		  -- stack trace:
		  | main.(*monitorImpl).wait.func3
		  | 	main/pkg/cmd/roachtest/monitor.go:202
		  | runtime.goexit
		  | 	GOROOT/src/runtime/asm_amd64.s:1581
		Wraps: (4) monitor command failure
		Wraps: (5) unexpected node event: 3: dead (exit status 137)
		Error types: (1) *withstack.withStack (2) *errutil.withPrefix (3) *withstack.withStack (4) *errutil.withPrefix (5) *errors.errorString