From 80cf8edc3137bae5b0117a60a327782af632a6cb Mon Sep 17 00:00:00 2001
From: Benjamin Koch <bbbsnowball@gmail.com>
Date: Sat, 2 Jul 2022 17:03:31 +0200
Subject: [PATCH] cmsisDAP: fix crash in case hid device cannot be opened

---
 src/cmsisDAP.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/cmsisDAP.cpp b/src/cmsisDAP.cpp
index e272a43..4078e05 100644
--- a/src/cmsisDAP.cpp
+++ b/src/cmsisDAP.cpp
@@ -144,6 +144,10 @@ CmsisDAP::CmsisDAP(int vid, int pid, uint8_t verbose):_verbose(verbose),
 		_serial_number = wstring(dev_found[_device_idx]->serial_number);
 	/* open the device */
 	_dev = hid_open_path(dev_found[_device_idx]->path);
+	if (!_dev) {
+		throw std::runtime_error(
+				std::string("Couldn't open device. Check permissions for ") + dev_found[_device_idx]->path);
+	}
 	/* cleanup enumeration */
 	hid_free_enumeration(devs);