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Fix GH-10571: Assertion `zval_get_type(&(*(zptr))) == 6 && "Concat sh… #111

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Fix GH-10571: Assertion `zval_get_type(&(*(zptr))) == 6 && "Concat sh… #111

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25 changes: 25 additions & 0 deletions Zend/tests/gh10571_1.phpt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,25 @@
--TEST--
GH-10571: Assertion `zval_get_type(&(*(zptr))) == 6 && "Concat should return string"' failed - OP
--FILE--
<?php
class A
{
public string $prop = "";
}

class B
{
public function __toString()
{
global $a;
$a = "";
return "";
}
}

$a = new A();
$a->prop .= new B();
var_dump($a);
?>
--EXPECT--
string(0) ""
25 changes: 25 additions & 0 deletions Zend/tests/gh10571_2.phpt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,25 @@
--TEST--
GH-10571: Assertion `zval_get_type(&(*(zptr))) == 6 && "Concat should return string"' failed - DIM OP
--FILE--
<?php
class A
{
public array $prop = ["a"];
}

class B
{
public function __toString()
{
global $a;
$a = "";
return "";
}
}

$a = new A();
$a->prop[0] .= new B();
var_dump($a);
?>
--EXPECT--
string(0) ""
30 changes: 30 additions & 0 deletions Zend/tests/gh10571_3.phpt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,30 @@
--TEST--
GH-10571: Assertion `zval_get_type(&(*(zptr))) == 6 && "Concat should return string"' failed - DIM OP resize
--FILE--
<?php
class A
{
public array $prop = ["a"];
}

class B
{
public function __toString()
{
global $a;
// Force a resize, but it will work on a copy instead
for ($i = 0; $i < 1000; $i++) {
$a->prop[] = $i;
}
return "x";
}
}

$a = new A();
$a->prop[0] .= new B();
var_dump(count($a->prop));
var_dump($a->prop[0]);
?>
--EXPECT--
int(1001)
string(1) "a"
11 changes: 11 additions & 0 deletions Zend/zend_vm_def.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1059,6 +1059,10 @@ ZEND_VM_C_LABEL(assign_op_object):
zval *orig_zptr = zptr;
zend_reference *ref;

if (OP1_TYPE == IS_CV) {
GC_ADDREF(zobj);
}

do {
if (UNEXPECTED(Z_ISREF_P(zptr))) {
ref = Z_REF_P(zptr);
Expand All @@ -1085,6 +1089,10 @@ ZEND_VM_C_LABEL(assign_op_object):
if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
ZVAL_COPY(EX_VAR(opline->result.var), zptr);
}

if (OP1_TYPE == IS_CV) {
GC_DTOR(zobj);
}
}
} else {
zend_assign_op_overloaded_property(zobj, name, cache_slot, value OPLINE_CC EXECUTE_DATA_CC);
Expand Down Expand Up @@ -1183,6 +1191,8 @@ ZEND_VM_C_LABEL(assign_dim_op_new_array):

value = get_op_data_zval_ptr_r((opline+1)->op1_type, (opline+1)->op1);

GC_ADDREF(ht);

do {
if (OP2_TYPE != IS_UNUSED && UNEXPECTED(Z_ISREF_P(var_ptr))) {
zend_reference *ref = Z_REF_P(var_ptr);
Expand All @@ -1198,6 +1208,7 @@ ZEND_VM_C_LABEL(assign_dim_op_new_array):
if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
ZVAL_COPY(EX_VAR(opline->result.var), var_ptr);
}
GC_DTOR_NO_REF(ht);
FREE_OP((opline+1)->op1_type, (opline+1)->op1.var);
} else {
if (EXPECTED(Z_ISREF_P(container))) {
Expand Down
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