Dangling Pointer Bug in C | Real POS Terminal Crash Explained

In this video, I explain dangling pointer issues in C using a real-world POS terminal scenario. Dangling pointers are one of the most common causes of crashes, undefined behavior, and random failures in embedded systems and payment terminals. I demonstrate how freeing memory without properly handling the pointer leads to dangerous bugs in POS terminal applications, especially in C-based embedded environments. Topics covered: ✔ What is a dangling pointer in C ✔ How malloc() and free() create dangling pointers ✔ Why POS terminals crash due to memory mismanagement ✔ Best practices to avoid dangling pointer bugs ✔ Real embedded systems debugging perspective This video is useful for: C programmers Embedded systems developers POS terminal developers Interview preparation (C & memory management) If you work on payment terminals, embedded Linux, or low-level C code, this is a must-watch! 👍 Like | 💬 Comment | 🔔 Subscribe for more C & Embedded System content