From 87a26ec31a3bfa08cd1fe83e0431103497d03f96 Mon Sep 17 00:00:00 2001
From: Nikolay Igotti <olonho@users.noreply.github.com>
Date: Fri, 27 Apr 2018 11:57:45 +0300
Subject: [PATCH] Fix off-by-one error in integer to string conversions.
 (#1545)

---
 runtime/src/main/cpp/ToString.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/runtime/src/main/cpp/ToString.cpp b/runtime/src/main/cpp/ToString.cpp
index f9aca84d044..b4895db60ec 100644
--- a/runtime/src/main/cpp/ToString.cpp
+++ b/runtime/src/main/cpp/ToString.cpp
@@ -41,7 +41,8 @@ template <typename T> OBJ_GETTER(Kotlin_toStringRadix, T value, KInt radix) {
   if (value == 0) {
     RETURN_RESULT_OF(CreateStringFromCString, "0");
   }
-  char cstring[sizeof(T) * CHAR_BIT + 1];
+  // In the worst case, we convert to binary, with sign.
+  char cstring[sizeof(T) * CHAR_BIT + 2];
   bool negative = (value < 0);
   if  (!negative) {
     value = -value;