From 6410f1ed7631ef1d64f010f1f13f16ba89257ae3 Mon Sep 17 00:00:00 2001
From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
Date: Sat, 11 Feb 2023 22:00:14 +0100
Subject: [PATCH] Fix assertion failure when var_dump'ing void FFI result

---
 ext/ffi/ffi.c              |  2 ++
 ext/ffi/tests/gh10568.phpt | 25 +++++++++++++++++++++++++
 2 files changed, 27 insertions(+)
 create mode 100644 ext/ffi/tests/gh10568.phpt

diff --git a/ext/ffi/ffi.c b/ext/ffi/ffi.c
index 107d2862c1256..ee5183ce9d46c 100644
--- a/ext/ffi/ffi.c
+++ b/ext/ffi/ffi.c
@@ -1982,6 +1982,8 @@ static HashTable *zend_ffi_cdata_get_debug_info(zend_object *obj, int *is_temp)
 	}
 
 	switch (type->kind) {
+		case ZEND_FFI_TYPE_VOID:
+			return NULL;
 		case ZEND_FFI_TYPE_BOOL:
 		case ZEND_FFI_TYPE_CHAR:
 		case ZEND_FFI_TYPE_ENUM:
diff --git a/ext/ffi/tests/gh10568.phpt b/ext/ffi/tests/gh10568.phpt
new file mode 100644
index 0000000000000..bd76671438d1b
--- /dev/null
+++ b/ext/ffi/tests/gh10568.phpt
@@ -0,0 +1,25 @@
+--TEST--
+GH-10568 (Assertion failure when var_dump'ing void FFI result)
+--EXTENSIONS--
+ffi
+--SKIPIF--
+<?php
+try {
+    $libc = FFI::cdef("void strlen(const char *s);", "libc.so.6");
+} catch (Throwable $_) {
+    die('skip libc.so.6 not available');
+}
+?>
+--INI--
+ffi.enable=1
+--FILE--
+<?php
+// Yes, I know that strlen does not return void, but I need a simple & portable test case.
+$libc = FFI::cdef("void strlen(const char *s);", "libc.so.6");
+var_dump($libc->strlen("abc"));
+?>
+DONE
+--EXPECT--
+object(FFI\CData:void)#2 (0) {
+}
+DONE