From 2eda6161d67d80a6ee9f2d2d018b893637928a2c Mon Sep 17 00:00:00 2001
From: Phil Turnbull <philipturnbull@github.com>
Date: Tue, 7 Aug 2018 12:24:25 -0400
Subject: [PATCH] Avoid integer truncation when serializing tag lengths

A tag longer than 255 characters will be incorrectly serialized.

Co-authored-by: Rahul Zhade <zhade3@github.com>
---
 src/scanner.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/scanner.cc b/src/scanner.cc
index 31feb38..0077c98 100644
--- a/src/scanner.cc
+++ b/src/scanner.cc
@@ -34,6 +34,7 @@ struct Scanner {
       Tag &tag = tags[j];
       if (tag.type == CUSTOM) {
         unsigned name_length = tag.custom_tag_name.size();
+        if (name_length > UINT8_MAX) break;
         if (i + 2 + name_length >= TREE_SITTER_SERIALIZATION_BUFFER_SIZE) break;
         buffer[i++] = static_cast<char>(tag.type);
         buffer[i++] = name_length;