From 0234a4129ad45a934cce6894508e49ad0e139ee2 Mon Sep 17 00:00:00 2001
From: Matt Witherspoon <32485495+spoonincode@users.noreply.github.com>
Date: Mon, 18 Sep 2023 22:15:37 -0400
Subject: [PATCH] do not perform arithmetic on nullptr

---
 libraries/wasm-jit/Include/Inline/Serialization.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/wasm-jit/Include/Inline/Serialization.h b/libraries/wasm-jit/Include/Inline/Serialization.h
index 7b0933339c..87eec16d72 100644
--- a/libraries/wasm-jit/Include/Inline/Serialization.h
+++ b/libraries/wasm-jit/Include/Inline/Serialization.h
@@ -35,7 +35,7 @@ namespace Serialization
 		// Advances the stream cursor by numBytes, and returns a pointer to the previous stream cursor.
 		inline U8* advance(Uptr numBytes)
 		{
-			if(next + numBytes > end) { extendBuffer(numBytes); }
+			if(next == nullptr || next + numBytes > end) { extendBuffer(numBytes); }
 			WAVM_ASSERT_THROW(next + numBytes <= end);
 
 			U8* data = next;