From: Eric Biggers <ebiggers3@gmail.com>
Date: Sat, 29 Jul 2017 20:20:16 +0000 (-0700)
Subject: win32_common: fix windows_msg() with long messages
X-Git-Tag: v1.12.0~2
X-Git-Url: https://wimlib.net/git/?p=wimlib;a=commitdiff_plain;h=50f603f90c63795aaa604e96d10790d872ac5093

win32_common: fix windows_msg() with long messages
---

diff --git a/src/win32_common.c b/src/win32_common.c
index 514965b8..47f2df30 100644
--- a/src/win32_common.c
+++ b/src/win32_common.c
@@ -274,9 +274,12 @@ windows_msg(u32 code, const wchar_t *format, va_list va,
 	size_t buflen = ARRAY_LEN(_buf);
 	size_t ret;
 	size_t n;
+	va_list va2;
 
 retry:
-	n = vsnwprintf(buf, buflen, format, va);
+	va_copy(va2, va);
+	n = vsnwprintf(buf, buflen, format, va2);
+	va_end(va2);
 
 	if (n >= buflen)
 		goto realloc;