From 8a0d98967f1f30047c44c2245c97af39f6fb4dff Mon Sep 17 00:00:00 2001
From: Siddharth Purohit <siddharthbharatpurohit@gmail.com>
Date: Wed, 19 Aug 2020 17:55:37 +0530
Subject: [PATCH] AP_CANManager: panic if can manager is used before allocation

---
 libraries/AP_CANManager/AP_CANManager.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libraries/AP_CANManager/AP_CANManager.h b/libraries/AP_CANManager/AP_CANManager.h
index 0cc569cef8..cb4dfba37b 100644
--- a/libraries/AP_CANManager/AP_CANManager.h
+++ b/libraries/AP_CANManager/AP_CANManager.h
@@ -36,6 +36,9 @@ public:
 
     static AP_CANManager* get_singleton()
     {
+        if (_singleton == nullptr) {
+            AP_HAL::panic("CANManager used before allocation.");
+        }
         return _singleton;
     }