diff --git a/json_object.c b/json_object.c
index 5a758d6..0175522 100644
--- a/json_object.c
+++ b/json_object.c
@@ -444,7 +444,7 @@ void json_object_object_add_ex(struct json_object* jso,
 	existing_entry->v = val;
 }
 
-void json_object_object_add(struct json_object* jso, const char *key,
+int json_object_object_add(struct json_object* jso, const char *key,
 			    struct json_object *val)
 {
 	// We lookup the entry and replace the value, rather than just deleting
@@ -455,13 +455,18 @@ void json_object_object_add(struct json_object* jso, const char *key,
 	existing_entry = lh_table_lookup_entry_w_hash(jso->o.c_object, (void*)key, hash);
 	if (!existing_entry)
 	{
-		lh_table_insert_w_hash(jso->o.c_object, strdup(key), val, hash, 0);
-		return;
+		char *keydup = strdup(key);
+		if (keydup == NULL)
+			return -1;
+
+		return lh_table_insert_w_hash(jso->o.c_object, keydup, val, hash, 0);
 	}
 	existing_value = (json_object  *)existing_entry->v;
 	if (existing_value)
 		json_object_put(existing_value);
 	existing_entry->v = val;
+
+	return 0;
 }
 
 
diff --git a/json_object.h b/json_object.h
index 6951019..5164e14 100644
--- a/json_object.h
+++ b/json_object.h
@@ -314,8 +314,11 @@ extern int json_object_object_length(struct json_object* obj);
  * @param obj the json_object instance
  * @param key the object field name (a private copy will be duplicated)
  * @param val a json_object or NULL member to associate with the given field
+ *
+ * @return On success, <code>0</code> is returned.
+ * 	On error, a negative value is returned.
  */
-extern void json_object_object_add(struct json_object* obj, const char *key,
+extern int json_object_object_add(struct json_object* obj, const char *key,
 				   struct json_object *val);
 
 /** Add an object field to a json_object of type json_type_object
diff --git a/linkhash.c b/linkhash.c
index e19297e..c89e35b 100644
--- a/linkhash.c
+++ b/linkhash.c
@@ -474,11 +474,17 @@ struct lh_table* lh_table_new(int size,
 	struct lh_table *t;
 
 	t = (struct lh_table*)calloc(1, sizeof(struct lh_table));
-	if(!t) lh_abort("lh_table_new: calloc failed\n");
+	if (!t)
+		return NULL;
+
 	t->count = 0;
 	t->size = size;
 	t->table = (struct lh_entry*)calloc(size, sizeof(struct lh_entry));
-	if(!t->table) lh_abort("lh_table_new: calloc failed\n");
+	if (!t->table)
+	{
+		free(t);
+		return NULL;
+	}
 	t->free_fn = free_fn;
 	t->hash_fn = hash_fn;
 	t->equal_fn = equal_fn;
@@ -498,18 +504,25 @@ struct lh_table* lh_kptr_table_new(int size,
 	return lh_table_new(size, free_fn, lh_ptr_hash, lh_ptr_equal);
 }
 
-void lh_table_resize(struct lh_table *t, int new_size)
+int lh_table_resize(struct lh_table *t, int new_size)
 {
 	struct lh_table *new_t;
-	struct lh_entry *ent;
 
 	new_t = lh_table_new(new_size, NULL, t->hash_fn, t->equal_fn);
-	ent = t->head;
-	while(ent) {
-		lh_table_insert_w_hash(new_t, ent->k, ent->v,
-			lh_get_hash(new_t, ent->k),
-			(ent->k_is_constant) ? JSON_C_OBJECT_KEY_IS_CONSTANT : 0 );
-		ent = ent->next;
+	if (new_t == NULL)
+		return -1;
+
+	for (struct lh_entry *ent = t->head; ent != NULL; ent = ent->next)
+	{
+		unsigned long h = lh_get_hash(new_t, ent->k);
+		unsigned int opts = 0;
+		if (ent->k_is_constant)
+			opts = JSON_C_OBJECT_KEY_IS_CONSTANT;
+		if (lh_table_insert_w_hash(new_t, ent->k, ent->v, h, opts) != 0)
+		{
+			lh_table_free(new_t);
+			return -1;
+		}
 	}
 	free(t->table);
 	t->table = new_t->table;
@@ -517,6 +530,8 @@ void lh_table_resize(struct lh_table *t, int new_size)
 	t->head = new_t->head;
 	t->tail = new_t->tail;
 	free(new_t);
+
+	return 0;
 }
 
 void lh_table_free(struct lh_table *t)
@@ -536,7 +551,9 @@ int lh_table_insert_w_hash(struct lh_table *t, void *k, const void *v, const uns
 {
 	unsigned long n;
 
-	if(t->count >= t->size * LH_LOAD_FACTOR) lh_table_resize(t, t->size * 2);
+	if (t->count >= t->size * LH_LOAD_FACTOR)
+		if (lh_table_resize(t, t->size * 2) != 0)
+			return -1;
 
 	n = h % t->size;
 
diff --git a/linkhash.h b/linkhash.h
index c037fef..ead4818 100644
--- a/linkhash.h
+++ b/linkhash.h
@@ -159,7 +159,8 @@ for(entry = table->head; entry && ((tmp = entry->next) || 1); entry = tmp)
  * @param equal_fn comparison function to compare keys. 2 standard ones defined:
  * lh_ptr_hash and lh_char_hash for comparing pointer values
  * and C strings respectively.
- * @return a pointer onto the linkhash table.
+ * @return On success, a pointer to the new linkhash table is returned.
+ * 	On error, a null pointer is returned.
  */
 extern struct lh_table* lh_table_new(int size,
 				     lh_entry_free_fn *free_fn,
@@ -172,7 +173,8 @@ extern struct lh_table* lh_table_new(int size,
  * @param size initial table size.
  * @param name table name.
  * @param free_fn callback function used to free memory for entries.
- * @return a pointer onto the linkhash table.
+ * @return On success, a pointer to the new linkhash table is returned.
+ * 	On error, a null pointer is returned.
  */
 extern struct lh_table* lh_kchar_table_new(int size,
 					   lh_entry_free_fn *free_fn);
@@ -184,7 +186,8 @@ extern struct lh_table* lh_kchar_table_new(int size,
  * @param size initial table size.
  * @param name table name.
  * @param free_fn callback function used to free memory for entries.
- * @return a pointer onto the linkhash table.
+ * @return On success, a pointer to the new linkhash table is returned.
+ * 	On error, a null pointer is returned.
  */
 extern struct lh_table* lh_kptr_table_new(int size,
 					  lh_entry_free_fn *free_fn);
@@ -204,6 +207,9 @@ extern void lh_table_free(struct lh_table *t);
  * @param t the table to insert into.
  * @param k a pointer to the key to insert.
  * @param v a pointer to the value to insert.
+ *
+ * @return On success, <code>0</code> is returned.
+ * 	On error, a negative value is returned.
  */
 extern int lh_table_insert(struct lh_table *t, void *k, const void *v);
 
@@ -287,8 +293,31 @@ extern int lh_table_delete(struct lh_table *t, const void *k);
 
 extern int lh_table_length(struct lh_table *t);
 
+/**
+ * Prints a message to <code>stdout</code>,
+ * then exits the program with an exit code of <code>1</code>.
+ *
+ * @param msg Message format string, like for <code>printf</code>.
+ * @param ... Format args.
+ *
+ * @deprecated Since it is not a good idea to exit the entire program
+ * 	because of an internal library failure, json-c will no longer
+ * 	use this function internally.
+ * 	However, because its interface is public, it will remain part of
+ * 	the API on the off chance of legacy software using it externally.
+ */
 void lh_abort(const char *msg, ...);
-void lh_table_resize(struct lh_table *t, int new_size);
+
+/**
+ * Resizes the specified table.
+ *
+ * @param t Pointer to table to resize.
+ * @param new_size New table size. Must be positive.
+ *
+ * @return On success, <code>0</code> is returned.
+ * 	On error, a negative value is returned.
+ */
+int lh_table_resize(struct lh_table *t, int new_size);
 
 
 /**