From e48a1310fe0d274e26aa220caf67c12761eaea4c Mon Sep 17 00:00:00 2001
From: sbaluja <114016489+sbaluja@users.noreply.github.com>
Date: Mon, 9 Mar 2026 20:31:36 -0400
Subject: [PATCH] Add null check for format in TIXML_VSCPRINTF (#1064)

---
 tinyxml2.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tinyxml2.cpp b/tinyxml2.cpp
index 50e6e2a..35e7703 100644
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -114,6 +114,9 @@ distribution.
 	#define TIXML_VSNPRINTF	vsnprintf
 	static inline int TIXML_VSCPRINTF( const char* format, va_list va )
 	{
+	    if (!format) {
+	        return 0;
+	    }
 		int len = vsnprintf( 0, 0, format, va );
 		TIXMLASSERT( len >= 0 );
 		return len;