From 33e24e157eccb1a7ea09a7320a85b96380a25b88 Mon Sep 17 00:00:00 2001
From: Marshall Clow <mclow.lists@gmail.com>
Date: Mon, 24 Jul 2017 14:05:10 +0000
Subject: [PATCH] make sure that we don't call basic_streambuf::gbump with a
 value bigger than INT_MAX, since it only takes an int. Related to, but not
 quite the same as PR33725

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@308880 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/streambuf | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/streambuf b/include/streambuf
index a10ce1bf5..f6182d64f 100644
--- a/include/streambuf
+++ b/include/streambuf
@@ -404,7 +404,8 @@ basic_streambuf<_CharT, _Traits>::xsgetn(char_type* __s, streamsize __n)
     {
         if (__ninp_ < __einp_)
         {
-            const streamsize __len = _VSTD::min(__einp_ - __ninp_, __n - __i);
+            const streamsize __len = _VSTD::min(static_cast<streamsize>(INT_MAX),
+                                _VSTD::min(__einp_ - __ninp_, __n - __i));
             traits_type::copy(__s, __ninp_, __len);
             __s +=  __len;
             __i +=  __len;