From 7543e8989abe41e87f260424b3711931d680da77 Mon Sep 17 00:00:00 2001
From: Daan <daanl@outlook.com>
Date: Sun, 13 Apr 2025 19:49:47 -0700
Subject: [PATCH] validate pointer before assertion in mi_free_size (issue
 #754)

---
 src/free.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/free.c b/src/free.c
index 7e529530..22284135 100644
--- a/src/free.c
+++ b/src/free.c
@@ -340,7 +340,11 @@ mi_decl_nodiscard size_t mi_usable_size(const void* p) mi_attr_noexcept {
 
 void mi_free_size(void* p, size_t size) mi_attr_noexcept {
   MI_UNUSED_RELEASE(size);
+  #if MI_DEBUG
+  mi_segment_t* const segment = mi_checked_ptr_segment(p,"mi_free_size");
+  if mi_unlikely(segment==NULL) return;
   mi_assert(p == NULL || size <= _mi_usable_size(p,"mi_free_size"));
+  #endif
   mi_free(p);
 }