Memory Leak in C when using `malloc` with linked lists
I'm attempting to set up I've tried everything I can think of but Quick question that's been bugging me - Quick question that's been bugging me - Quick question that's been bugging me - I'm encountering a memory leak when trying to implement a simple linked list in C. The program compiles and runs, but when I use a memory profiler, it reports a consistent leak during the insertion of new nodes. I've defined a basic structure for my linked list's nodes like this: ```c typedef struct Node { int data; struct Node* next; } Node; ``` When I add nodes to the list, I allocate memory using `malloc` but it seems like I'm not freeing it correctly. Here’s the code I'm using to insert a new node: ```c void insert(Node** head_ref, int new_data) { Node* new_node = (Node*)malloc(sizeof(Node)); if (new_node == NULL) { fprintf(stderr, "Memory allocation failed!"); return; } new_node->data = new_data; new_node->next = (*head_ref); (*head_ref) = new_node; } ``` I call this function multiple times to add values. However, when the program ends, I don't see a proper cleanup function that frees the allocated memory. I have a simple function to free the list, which looks like this: ```c void freeList(Node* head) { Node* temp; while (head != NULL) { temp = head; head = head->next; free(temp); } } ``` I call `freeList(head)` at the end of my `main` function, but the profiler still indicates that memory remains allocated. I'm using GCC version 10.2 on Ubuntu 20.04. Is there a chance that I'm missing something in my implementation? Any suggestions on how to ensure all allocated memory is freed correctly? Is there a better approach? Any ideas what could be causing this? My development environment is Linux. This issue appeared after updating to C 3.11. Am I missing something obvious? Am I approaching this the right way?