From 1245d54fb806726b5fbd627fb8a91dd5e7e3680a Mon Sep 17 00:00:00 2001
From: Sebastian Lackner <sebastian@fds-team.de>
Date: Thu, 4 Nov 2021 00:58:48 +0100
Subject: [PATCH] Fix crash in ts_node_field_name_for_child when no children
 are present

---
 lib/src/node.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/src/node.c b/lib/src/node.c
index 156b9a18..de59504e 100644
--- a/lib/src/node.c
+++ b/lib/src/node.c
@@ -571,6 +571,10 @@ recur:
 
 const char *ts_node_field_name_for_child(TSNode self, uint32_t child_index) {
   const TSFieldMapEntry *field_map_start = NULL, *field_map_end = NULL;
+  if (!ts_node_child_count(self)) {
+    return NULL;
+  }
+
   ts_language_field_map(
     self.tree->language,
     ts_node__subtree(self).ptr->production_id,