--- /dev/null
+++ Libc/Libc-763.12/stdio/FreeBSD/vswprintf.c.patch
@@ -0,0 +1,63 @@
+--- vswprintf.c.orig	2009-11-30 16:15:30.000000000 -0800
++++ vswprintf.c	2009-12-03 15:21:59.000000000 -0800
+@@ -33,6 +33,8 @@ __FBSDID("FreeBSD: src/lib/libc/stdio/va
+ #endif
+ __FBSDID("$FreeBSD: src/lib/libc/stdio/vswprintf.c,v 1.7 2008/04/17 22:17:54 jhb Exp $");
+ 
++#include "xlocale_private.h"
++
+ #include <errno.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+@@ -40,8 +42,8 @@ __FBSDID("$FreeBSD: src/lib/libc/stdio/v
+ #include "local.h"
+ 
+ int
+-vswprintf(wchar_t * __restrict s, size_t n, const wchar_t * __restrict fmt,
+-    __va_list ap)
++vswprintf_l(wchar_t * __restrict s, size_t n, locale_t loc,
++    const wchar_t * __restrict fmt, __va_list ap)
+ {
+ 	static const mbstate_t initial;
+ 	mbstate_t mbs;
+@@ -49,7 +51,11 @@ vswprintf(wchar_t * __restrict s, size_t
+ 	char *mbp;
+ 	int ret, sverrno;
+ 	size_t nwc;
++	struct __sFILEX ext;
++	f._extra = &ext;
++	INITEXTRA(&f);
+ 
++	NORMALIZE_LOCALE(loc);
+ 	if (n == 0) {
+ 		errno = EINVAL;
+ 		return (-1);
+@@ -65,7 +71,7 @@ vswprintf(wchar_t * __restrict s, size_t
+ 	f._bf._size = f._w = 127;		/* Leave room for the NUL */
+ 	f._orientation = 0;
+ 	memset(&f._mbstate, 0, sizeof(mbstate_t));
+-	ret = __vfwprintf(&f, fmt, ap);
++	ret = __vfwprintf(&f, loc, fmt, ap);
+ 	if (ret < 0) {
+ 		sverrno = errno;
+ 		free(f._bf._base);
+@@ -79,7 +85,7 @@ vswprintf(wchar_t * __restrict s, size_t
+ 	 * fputwc() did in __vfwprintf().
+ 	 */
+ 	mbs = initial;
+-	nwc = mbsrtowcs(s, (const char **)&mbp, n, &mbs);
++	nwc = mbsrtowcs_l(s, (const char **)&mbp, n, &mbs, loc);
+ 	free(f._bf._base);
+ 	if (nwc == (size_t)-1) {
+ 		errno = EILSEQ;
+@@ -93,3 +99,10 @@ vswprintf(wchar_t * __restrict s, size_t
+ 
+ 	return (ret);
+ }
++
++int
++vswprintf(wchar_t * __restrict s, size_t n,
++    const wchar_t * __restrict fmt, __va_list ap)
++{
++	return vswprintf_l(s, n, __current_locale(), fmt, ap);
++}