From 901e8cb224c7b55f74d1c55453dde25af5b8429f Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Sat, 3 Feb 2018 23:13:05 +0300
Subject: [PATCH] Fix narrowing conversion.

GitOrigin-RevId: c9f9fe9be4285b82e875140900065e328b8df32f
---
 tdutils/td/utils/StringBuilder.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tdutils/td/utils/StringBuilder.cpp b/tdutils/td/utils/StringBuilder.cpp
index a36f5e574..93fb20f05 100644
--- a/tdutils/td/utils/StringBuilder.cpp
+++ b/tdutils/td/utils/StringBuilder.cpp
@@ -81,7 +81,7 @@ StringBuilder &StringBuilder::operator<<(double x) {
   auto left = end_ptr_ + reserved_size - current_ptr_;
   if (unlikely(len >= left)) {
     error_flag_ = true;
-    len = left - 1;
+    len = left ? narrow_cast<int>(left - 1) : 0;
   }
   ss->read(current_ptr_, len);
   current_ptr_ += len;