Index: build/android/pylib/device/adb_wrapper.py |
diff --git a/build/android/pylib/device/adb_wrapper.py b/build/android/pylib/device/adb_wrapper.py |
index c03964a0695d04107af0000901371ce4d07dcefc..ea5698c2762982d6733e415aac97c966e8f7d5c9 100644 |
--- a/build/android/pylib/device/adb_wrapper.py |
+++ b/build/android/pylib/device/adb_wrapper.py |
@@ -44,6 +44,8 @@ class AdbWrapper(object): |
Args: |
device_serial: The device serial number as a string. |
""" |
+ if not device_serial: |
+ raise ValueError('A device serial must be specified') |
self._device_serial = str(device_serial) |
# pylint: disable=unused-argument |