https://pantheon.corp.google.com/storage/browser/chromeos-autotest-results/60753935-chromeos-test/brillo-row1-legorack3-b1e12318/

We get a stack trace where it seems the serial isn't passed in or gathered.

04:13:48 ERROR| Traceback (most recent call last):
04:13:48 ERROR|   File "/usr/local/autotest/server/autoserv", line 547, in run_autoserv
04:13:48 ERROR|     use_packaging=(not no_use_packaging))
04:13:48 ERROR|   File "/usr/local/autotest/server/site_server_job.py", line 65, in run
04:13:48 ERROR|     super(site_server_job, self).run(*args, **dargs)
04:13:48 ERROR|   File "/usr/local/autotest/server/server_job.py", line 716, in run
04:13:48 ERROR|     self._execute_code(CRASHINFO_CONTROL_FILE, namespace)
04:13:48 ERROR|   File "/usr/local/autotest/server/server_job.py", line 1182, in _execute_code
04:13:48 ERROR|     execfile(code_file, namespace, namespace)
04:13:48 ERROR|   File "/usr/local/autotest/server/control_segments/crashinfo", line 14, in <module>
04:13:48 ERROR|     job.parallel_simple(crashinfo, machines, log=False)
04:13:48 ERROR|   File "/usr/local/autotest/server/server_job.py", line 574, in parallel_simple
04:13:48 ERROR|     return_results=return_results)
04:13:48 ERROR|   File "/usr/local/autotest/server/subcommand.py", line 93, in parallel_simple
04:13:48 ERROR|     function(arg)
04:13:48 ERROR|   File "/usr/local/autotest/server/control_segments/crashinfo", line 10, in crashinfo
04:13:48 ERROR|     host = hosts.create_host(machine, initialize=False, auto_monitor=False)
04:13:48 ERROR|   File "/usr/local/autotest/server/hosts/factory.py", line 160, in create_host
04:13:48 ERROR|     host_instance = host_class(hostname, **args)
04:13:48 ERROR|   File "/usr/local/autotest/server/hosts/base_classes.py", line 58, in __init__
04:13:48 ERROR|     super(Host, self).__init__(*args, **dargs)
04:13:48 ERROR|   File "/usr/local/autotest/client/common_lib/hosts/base_classes.py", line 70, in __init__
04:13:48 ERROR|     self._initialize(*args, **dargs)
04:13:48 ERROR|   File "/usr/local/autotest/server/hosts/adb_host.py", line 209, in _initialize
04:13:48 ERROR|     adb_prefix = any(adb_serial.startswith(p) for p in ADB_DEVICE_PREFIXES)
04:13:48 ERROR|   File "/usr/local/autotest/server/hosts/adb_host.py", line 209, in <genexpr>
04:13:48 ERROR|     adb_prefix = any(adb_serial.startswith(p) for p in ADB_DEVICE_PREFIXES)
04:13:48 ERROR| AttributeError: 'NoneType' object has no attribute 'startswith'