Thanks to the wonders of UB, the sample on the article when compiled with optimization on, it actually reduces to,

   //clang -o null_dereference null_dereference.c
   #include <stdio.h>

   int main() {
      int *ptr = NULL;  // Initialize a pointer to NULL
      int value = *ptr; // Attempt to dereference the NULL pointer 

      printf("Value: %d\n", value); // This line will reached, because the previous will be optimized away.

    return 0;
    }

Example, https://godbolt.org/z/Kv3rcz1ch