From 6ca033d2784cbdf886b54d4acc4b8f6e1417cd22 Mon Sep 17 00:00:00 2001
From: TheQuantumPhysicist <info@afach.de>
Date: Fri, 9 Aug 2019 21:24:48 +0200
Subject: [PATCH] hid_error() could return a null, which causes the program to
 crash with std::logic_error()

---
 src/device/device_io_hid.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/device/device_io_hid.cpp b/src/device/device_io_hid.cpp
index 721bed9ca..72f4c3bdb 100644
--- a/src/device/device_io_hid.cpp
+++ b/src/device/device_io_hid.cpp
@@ -44,7 +44,8 @@ namespace hw {
     
     static std::string safe_hid_error(hid_device *hwdev) {
       if (hwdev) {
-        return  std::string((char*)hid_error(hwdev));
+        const char* error_str = (const char*)hid_error(hwdev);
+        return  std::string(error_str == nullptr ? "Unknown error" : error_str);
       }
       return std::string("NULL device");
     }