fix(types::list): erroneous get and remove

include/types/list.hpp

@@ -16,6 +16,8 @@ ListNode* list_get(ListNode** head) {
     ListNode* node = *head;
     if (node) {
         *head = node->next;
+        if (*head)
+            (*head)->prev = nullptr;
 
         node->next = nullptr;
         node->prev = nullptr;
@@ -25,10 +27,18 @@ ListNode* list_get(ListNode** head) {
 
 template <typename ListNode>
 void list_remove(ListNode** head, ListNode* node) {
-    if (node->prev)
-        node->prev->next = node->next;
-    else
+    if (node == *head) {
+        assert(!node->prev);
+
         *head = node->next;
+        if (*head)
+            (*head)->prev = nullptr;
+    }
+    else {
+        assert(node->prev);
+
+        node->prev->next = node->next;
+    }
 
     if (node->next)
         node->next->prev = node->prev;