From 401724324f8eb136a29872fa22d87ab51a5c200e Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Thu, 7 Dec 2023 08:36:47 -0800
Subject: [PATCH] `<sstream>`: Avoid truncation warnings in `basic_stringbuf`'s
 constructor (#4228)

---
 stl/inc/sstream | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stl/inc/sstream b/stl/inc/sstream
index c78711c54a..59f0e6b6c0 100644
--- a/stl/inc/sstream
+++ b/stl/inc/sstream
@@ -54,7 +54,7 @@ public:
     template <class _Alloc2>
     basic_stringbuf(const basic_string<_Elem, _Traits, _Alloc2>& _Str, ios_base::openmode _Mode, const _Alloc& _Al_)
         : _Al(_Al_) {
-        _Init(_Str.c_str(), _Str.size(), _Getstate(_Mode));
+        _Init(_Str.c_str(), _Convert_size<_Mysize_type>(_Str.size()), _Getstate(_Mode));
     }
 
     template <class _Alloc2>