From 6af6f3eb9beb30d6a50551e09515e88fdbd02ca6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>
Date: Fri, 3 Feb 2023 16:21:17 +0100
Subject: [PATCH] gslice: Do not try to memset-0 NULL a pointer

According to the docs, g_slice_free1() is supposed to do nothing if
@mem_block is NULL, but we still try to zero it in case we're using
g_mem_gc_friendly.

So avoid this case.

Closes: #2908
---
 glib/gslice.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/glib/gslice.c b/glib/gslice.c
index 11d8c3fb2..63a048458 100644
--- a/glib/gslice.c
+++ b/glib/gslice.c
@@ -331,7 +331,7 @@ void
 g_slice_free1 (gsize    mem_size,
                gpointer mem_block)
 {
-  if (G_UNLIKELY (g_mem_gc_friendly))
+  if (G_UNLIKELY (g_mem_gc_friendly && mem_block))
     memset (mem_block, 0, mem_size);
   g_free_sized (mem_block, mem_size);
   TRACE (GLIB_SLICE_FREE((void*)mem_block, mem_size));