From 4f92f575c5650058130415329410b1c5171c5554 Mon Sep 17 00:00:00 2001
From: Martin Michalec <martin@michalec.dev>
Date: Sun, 22 Feb 2026 06:12:25 +0300
Subject: improve arena__reserve alignment edge case handling

---
 src/arena.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'src/arena.c')

diff --git a/src/arena.c b/src/arena.c
index d02694d..84334d2 100644
--- a/src/arena.c
+++ b/src/arena.c
@@ -74,8 +74,7 @@ arena__reserve (struct cmmm__arena *arena, size_t size, size_t alignment)
 
   if (arena->tail != NULL) {
     char *aligned_free = alignto (arena->tail->free, alignment);
-    ASSERT (aligned_free - arena->tail->end >= 0);
-    if ((size_t) (aligned_free - arena->tail->end) >= size)
+    if (arena->tail->end - aligned_free >= (ssize_t) size)
       return aligned_free;
   }
 
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