From afc64ebaa78fed86a39cbc61579a2917d9089a74 Mon Sep 17 00:00:00 2001
From: SChernykh <15806605+SChernykh@users.noreply.github.com>
Date: Wed, 12 Mar 2025 12:29:38 +0100
Subject: [PATCH] Fixed a crash on some systems when freeing memory

---
 src/virtual_memory.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/virtual_memory.c b/src/virtual_memory.c
index d2cdcda0..1000d99f 100644
--- a/src/virtual_memory.c
+++ b/src/virtual_memory.c
@@ -235,6 +235,9 @@ void freePagedMemory(void* ptr, size_t bytes) {
 #if defined(_WIN32) || defined(__CYGWIN__)
 	VirtualFree(ptr, 0, MEM_RELEASE);
 #else
-	munmap(ptr, bytes);
+	// some munmap implementations can crash on null pointer, despite what the manpage says
+	if (ptr) {
+		munmap(ptr, bytes);
+	}
 #endif
 }