From 925c06beb826955448f8dc3c77f859b9e8d3c713 Mon Sep 17 00:00:00 2001
From: Patrick Pelissier <Patrick.Pelissier@gmail.com>
Date: Fri, 24 Feb 2023 15:07:29 +0100
Subject: [PATCH] Fix usage of va_copy

---
 m-string.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/m-string.h b/m-string.h
index 9918252b..6e0890f4 100644
--- a/m-string.h
+++ b/m-string.h
@@ -1077,8 +1077,7 @@ m_string_vprintf (m_string_t v, const char format[], va_list args)
     ptr = m_str1ng_fit2size (v, (size_t) size + 1);
     alloc = m_string_capacity(v);
     // and redo the parsing.
-    va_copy(args, args_org);
-    size = vsnprintf (ptr, alloc, format, args);
+    size = vsnprintf (ptr, alloc, format, args_org);
     M_ASSERT (size > 0 && (size_t)size < alloc);
   }
   if (M_LIKELY (size >= 0)) {
@@ -1088,6 +1087,7 @@ m_string_vprintf (m_string_t v, const char format[], va_list args)
     m_str1ng_set_size(v, 0);
     ptr[0] = 0;
   }
+  va_end(args_org);
   M_STR1NG_CONTRACT (v);
   return size;
 }