From aca621cf926cf86fd186395d3877fc63b65f3d16 Mon Sep 17 00:00:00 2001
From: "Christoph M. Becker" <cmbecker69@gmx.de>
Date: Mon, 29 Jun 2020 15:39:17 +0200
Subject: [PATCH] Fix #79749: Converting FFI instances to bool fails

Casting objects to bool is supposed to yield `true`.  Since the
`cast_object` handler is required now, we have to implement the
`_IS_BOOL` conversion there.
---
 NEWS                        |  7 ++++++-
 ext/ffi/ffi.c               | 11 ++++++++++-
 ext/ffi/tests/bug79749.phpt | 17 +++++++++++++++++
 3 files changed, 33 insertions(+), 2 deletions(-)
 create mode 100644 ext/ffi/tests/bug79749.phpt

diff --git a/NEWS b/NEWS
index edaf30af76..84e904da44 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,11 @@
 PHP                                                                        NEWS
 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
-?? ??? ????, PHP 8.0.0alpha1
+?? ??? ????, PHP 8.0.0alpha2
+
+- FFI:
+  . Fixed bug #79749 (Converting FFI instances to bool fails). (cmb)
+
+25 Jun 2020, PHP 8.0.0alpha1
 
 - Core:
   . Removed the pdo_odbc.db2_instance_name php.ini directive. (Kalle)
diff --git a/ext/ffi/ffi.c b/ext/ffi/ffi.c
index 28baf1fd31..946f6c9845 100644
--- a/ext/ffi/ffi.c
+++ b/ext/ffi/ffi.c
@@ -1096,6 +1096,9 @@ again:
 		}
 		convert_to_string(writeobj);
 		return SUCCESS;
+	} else if (type == _IS_BOOL) {
+		ZVAL_TRUE(writeobj);
+		return SUCCESS;
 	}
 
 	return FAILURE;
@@ -4642,7 +4645,13 @@ static HashTable *zend_fake_get_gc(zend_object *ob, zval **table, int *n) /* {{{
 
 static int zend_fake_cast_object(zend_object *obj, zval *result, int type)
 {
-	return FAILURE;
+	switch (type) {
+		case _IS_BOOL:
+			ZVAL_TRUE(result);
+			return SUCCESS;
+		default:
+			return FAILURE;
+	}
 }
 
 static ZEND_COLD zend_never_inline void zend_ffi_use_after_free(void) /* {{{ */
diff --git a/ext/ffi/tests/bug79749.phpt b/ext/ffi/tests/bug79749.phpt
new file mode 100644
index 0000000000..5e0862a207
--- /dev/null
+++ b/ext/ffi/tests/bug79749.phpt
@@ -0,0 +1,17 @@
+--TEST--
+Bug #79749 (Converting FFI instances to bool fails)
+--SKIPIF--
+<?php
+if (!extension_loaded('ffi')) die('skip ffi extension not available');
+?>
+--FILE--
+<?php
+$ffi = FFI::cdef('typedef int dummy;');
+var_dump((bool) $ffi);
+var_dump((bool) FFI::type('int'));
+var_dump((bool) FFI::new('int'));
+?>
+--EXPECT--
+bool(true)
+bool(true)
+bool(true)
-- 
2.50.1