Delay freeing of overwritten values in assignments

Zend/tests/gh10168/assign.phpt

@@ -0,0 +1,18 @@
+--TEST--
+GH-10168: Assign
+--FILE--
+<?php
+
+class Test {
+    function __destruct() {
+        $GLOBALS['a'] = null;
+    }
+}
+
+$a = new Test;
+var_dump($a = new Test);
+
+?>
+--EXPECT--
+object(Test)#2 (0) {
+}

Zend/tests/gh10168/assign_dim.phpt

@@ -0,0 +1,18 @@
+--TEST--
+GH-10168: Assign dim
+--FILE--
+<?php
+
+class Test {
+    function __destruct() {
+        $GLOBALS['a'] = null;
+    }
+}
+
+$a = [new Test];
+var_dump($a[0] = new Test);
+
+?>
+--EXPECT--
+object(Test)#2 (0) {
+}

Zend/tests/gh10168/assign_dim_ref.phpt

@@ -0,0 +1,19 @@
+--TEST--
+GH-10168: Assign dim ref
+--FILE--
+<?php
+
+class Test {
+    function __destruct() {
+        $GLOBALS['a'] = null;
+    }
+}
+
+$a = [new Test];
+$tmp = new Test;
+var_dump($a[0] = &$tmp);
+
+?>
+--EXPECT--
+object(Test)#2 (0) {
+}

Zend/tests/gh10168/assign_dim_ref_with_prop_ref.phpt

@@ -0,0 +1,22 @@
+--TEST--
+GH-10168: Assign dim ref with prop ref
+--FILE--
+<?php
+
+class Test {
+    static ?Test $test;
+
+    function __destruct() {
+        $GLOBALS['a'] = null;
+    }
+}
+
+$a = [new Test];
+Test::$test = &$a[0];
+$tmp = new Test;
+var_dump($a[0] = &$tmp);
+
+?>
+--EXPECT--
+object(Test)#2 (0) {
+}

Zend/tests/gh10168/assign_dim_with_prop_ref.phpt

@@ -0,0 +1,21 @@
+--TEST--
+GH-10168: Assign dim with prop ref
+--FILE--
+<?php
+
+class Test {
+    static ?Test $test;
+
+    function __destruct() {
+        $GLOBALS['a'] = null;
+    }
+}
+
+$a = [new Test];
+Test::$test = &$a[0];
+var_dump($a[0] = new Test);
+
+?>
+--EXPECT--
+object(Test)#2 (0) {
+}

Zend/tests/gh10168/assign_prop.phpt

@@ -0,0 +1,32 @@
+--TEST--
+GH-10168: Assign prop
+--FILE--
+<?php
+
+class Box {
+    public ?Test $value;
+}
+
+class Test {
+    function __destruct() {
+        global $box;
+        $box->value = null;
+    }
+}
+
+function test($box) {
+    var_dump($box->value = new Test);
+}
+
+$box = new Box();
+$box->value = new Test;
+test($box);
+// Second call tests the cache slot path
+test($box);
+
+?>
+--EXPECT--
+object(Test)#3 (0) {
+}
+object(Test)#3 (0) {
+}

Zend/tests/gh10168/assign_prop_ref.phpt

@@ -0,0 +1,32 @@
+--TEST--
+GH-10168: Assign prop ref
+--FILE--
+<?php
+
+class Box {
+    public ?Test $value;
+}
+
+class Test {
+    function __destruct() {
+        global $box;
+        $box->value = null;
+    }
+}
+
+function test($box) {
+    $tmp = new Test;
+    var_dump($box->value = &$tmp);
+}
+
+$box = new Box();
+$box->value = new Test;
+test($box);
+// Second call tests the cache slot path
+test($box);
+
+?>
+--EXPECT--
+NULL
+object(Test)#2 (0) {
+}

Zend/tests/gh10168/assign_prop_ref_with_prop_ref.phpt

@@ -0,0 +1,35 @@
+--TEST--
+GH-10168: Assign prop ref with prop ref
+--FILE--
+<?php
+
+class Box {
+    public ?Test $value;
+}
+
+class Test {
+    static ?Test $test;
+
+    function __destruct() {
+        global $box;
+        $box->value = null;
+    }
+}
+
+function test($box) {
+    $tmp = new Test;
+    var_dump($box->value = &$tmp);
+}
+
+$box = new Box();
+$box->value = new Test;
+Test::$test = &$box->value;
+test($box);
+// Second call tests the cache slot path
+test($box);
+
+?>
+--EXPECT--
+object(Test)#3 (0) {
+}
+NULL

Zend/tests/gh10168/assign_prop_with_prop_ref.phpt

@@ -0,0 +1,35 @@
+--TEST--
+GH-10168: Assign prop with prop ref
+--FILE--
+<?php
+
+class Box {
+    public ?Test $value;
+}
+
+class Test {
+    static ?Test $test;
+
+    function __destruct() {
+        global $box;
+        $box->value = null;
+    }
+}
+
+function test($box) {
+    var_dump($box->value = new Test);
+}
+
+$box = new Box();
+$box->value = new Test;
+Test::$test = &$box->value;
+test($box);
+// Second call tests the cache slot path
+test($box);
+
+?>
+--EXPECT--
+object(Test)#3 (0) {
+}
+object(Test)#3 (0) {
+}

Zend/tests/gh10168/assign_ref.phpt

@@ -0,0 +1,18 @@
+--TEST--
+GH-10168: Assign ref
+--FILE--
+<?php
+
+class Test {
+    function __destruct() {
+        $GLOBALS['a'] = null;
+    }
+}
+
+$a = new Test;
+$tmp = new Test;
+var_dump($a = &$tmp);
+
+?>
+--EXPECT--
+NULL

Zend/tests/gh10168/assign_ref_with_prop_ref.phpt

@@ -0,0 +1,20 @@
+--TEST--
+GH-10168: Assign ref with prop ref
+--FILE--
+<?php
+
+class Test {
+    static ?Test $test;
+
+    function __destruct() {
+        $GLOBALS['a'] = null;
+    }
+}
+
+$a = new Test;
+$tmp = new Test;
+var_dump($a = &$tmp);
+
+?>
+--EXPECT--
+NULL

Zend/tests/gh10168/assign_static_prop.phpt

@@ -0,0 +1,20 @@
+--TEST--
+GH-10168: Assign static prop
+--FILE--
+<?php
+
+class Test {
+    static ?Test $test;
+
+    function __destruct() {
+        Test::$test = null;
+    }
+}
+
+Test::$test = new Test;
+var_dump(Test::$test = new Test);
+
+?>
+--EXPECT--
+object(Test)#2 (0) {
+}

Zend/tests/gh10168/assign_static_prop_ref.phpt

@@ -0,0 +1,20 @@
+--TEST--
+GH-10168: Assign static prop ref
+--FILE--
+<?php
+
+class Test {
+    static ?Test $test;
+
+    function __destruct() {
+        Test::$test = null;
+    }
+}
+
+Test::$test = new Test;
+$tmp = new Test;
+var_dump(Test::$test = &$tmp);
+
+?>
+--EXPECT--
+NULL

Zend/tests/gh10168/assign_static_prop_ref_with_prop_ref.phpt

@@ -0,0 +1,23 @@
+--TEST--
+GH-10168: Assign static prop ref with prop ref
+--FILE--
+<?php
+
+class Test {
+    static ?Test $test;
+    static ?Test $test2;
+
+    function __destruct() {
+        Test::$test = null;
+    }
+}
+
+Test::$test = new Test;
+Test::$test2 = &Test::$test;
+$tmp = new Test;
+var_dump(Test::$test = &$tmp);
+
+?>
+--EXPECT--
+object(Test)#2 (0) {
+}

Zend/tests/gh10168/assign_static_prop_with_prop_ref.phpt

@@ -0,0 +1,22 @@
+--TEST--
+GH-10168: Assign static prop with prop ref
+--FILE--
+<?php
+
+class Test {
+    static ?Test $test;
+    static ?Test $test2;
+
+    function __destruct() {
+        Test::$test = null;
+    }
+}
+
+Test::$test = new Test;
+Test::$test2 = &Test::$test;
+var_dump(Test::$test = new Test);
+
+?>
+--EXPECT--
+object(Test)#2 (0) {
+}

Zend/tests/gh10168/assign_static_untyped_prop.phpt

@@ -0,0 +1,20 @@
+--TEST--
+GH-10168: Assign static prop
+--FILE--
+<?php
+
+class Test {
+    static $test;
+
+    function __destruct() {
+        Test::$test = null;
+    }
+}
+
+Test::$test = new Test;
+var_dump(Test::$test = new Test);
+
+?>
+--EXPECT--
+object(Test)#2 (0) {
+}