From a430c4030377d360f01941bce7bca04e5fc1684c Mon Sep 17 00:00:00 2001
From: John Holdsworth <github@johnholdsworth.com>
Date: Fri, 23 Sep 2016 06:50:22 +0100
Subject: [PATCH] Bug in Windows swift_vasprintf()

---
 stdlib/public/runtime/Errors.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stdlib/public/runtime/Errors.cpp b/stdlib/public/runtime/Errors.cpp
index e45c5bf08a9b5..1b88d7b224c1c 100644
--- a/stdlib/public/runtime/Errors.cpp
+++ b/stdlib/public/runtime/Errors.cpp
@@ -242,7 +242,7 @@ static int swift_vasprintf(char **strp, const char *fmt, va_list ap) {
   char *buffer = reinterpret_cast<char *>(malloc(len + 1));
   if (!buffer)
     return -1;
-  int result = vsprintf(*strp, fmt, ap);
+  int result = vsprintf(buffer, fmt, ap);
   if (result < 0) {
     free(buffer);
     return -1;