diff --git a/debug_test_codes/ref_null.c b/debug_test_codes/ref_null.c
new file mode 100644
index 0000000..e008bd2
--- /dev/null
+++ b/debug_test_codes/ref_null.c
@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main(int argc, char const *argv[]){
+    printf("%d\n", *(int*)(NULL));
+    return 0;
+}