From f5ea6c70bdaa55e3709858490164752dc8c30945 Mon Sep 17 00:00:00 2001
From: daan <daanl@outlook.com>
Date: Fri, 17 Dec 2021 13:40:39 -0800
Subject: [PATCH] NetBSD mi_reallocarr should update errno (based on PR #499 by
 @devexen)

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

diff --git a/src/alloc-posix.c b/src/alloc-posix.c
index 03171081..ee5babe1 100644
--- a/src/alloc-posix.c
+++ b/src/alloc-posix.c
@@ -103,7 +103,10 @@ void* mi_reallocarray( void* p, size_t count, size_t size ) mi_attr_noexcept {
 
 int mi_reallocarr( void* p, size_t count, size_t size ) mi_attr_noexcept { // NetBSD
   mi_assert(p != NULL);
-  if (p == NULL) return EINVAL;  // should we set errno as well?
+  if (p == NULL) {
+    errno = EINVAL;
+    return EINVAL;
+  }
   void** op = (void**)p;  
   void* newp = mi_reallocarray(*op, count, size);
   if (mi_unlikely(newp == NULL)) return errno;