From b8797a647406d31ebfd137a9ae07819ccf332a10 Mon Sep 17 00:00:00 2001
From: Stefan Boberg <stefan@boberg.org>
Date: Thu, 16 Jun 2022 15:42:17 +0200
Subject: merged from main

---
 zencore/iobuffer.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'zencore/iobuffer.cpp')

diff --git a/zencore/iobuffer.cpp b/zencore/iobuffer.cpp
index 56b05d86d..37ef57c2d 100644
--- a/zencore/iobuffer.cpp
+++ b/zencore/iobuffer.cpp
@@ -274,6 +274,8 @@ IoBufferExtendedCore::Materialize() const
 	const uint64_t MappedOffsetDisplacement = m_FileOffset - MapOffset;
 	const uint64_t MapSize					= m_DataBytes + MappedOffsetDisplacement;
 
+	ZEN_ASSERT(MapSize > 0);
+
 #if ZEN_PLATFORM_WINDOWS
 	NewMmapHandle = CreateFileMapping(m_FileHandle,
 									  /* lpFileMappingAttributes */ nullptr,
-- 
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