From 68051a9c41235e807c4d3149ff61b1451ce7818d Mon Sep 17 00:00:00 2001
From: OpenHTF Owners <no-reply@google.com>
Date: Thu, 5 Oct 2023 18:02:33 -0700
Subject: [PATCH] Internal change.

PiperOrigin-RevId: 571185985
---
 openhtf/plugs/usb/fastboot_device.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/openhtf/plugs/usb/fastboot_device.py b/openhtf/plugs/usb/fastboot_device.py
index 47251bf60..ec53e30cc 100644
--- a/openhtf/plugs/usb/fastboot_device.py
+++ b/openhtf/plugs/usb/fastboot_device.py
@@ -51,6 +51,8 @@ def __init__(self, _, num_retries=3):
   @property
   def usb_handle(self):
     """Return our USB handle."""
+    if not self._protocol:
+      raise usb_exceptions.HandleClosedError()
     return self._protocol.usb_handle
 
   def set_boot_config(self, name, value):