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Segmentation fault Zend/zend_hash.h:1629 #17200
Description
Description
The following code:
<?php
class A {
public $prop = 41;
}
class B extends A {
public $prop = 42 {
get {
}
}
}
$b = new B();
var_dump($b);
$fusion = $b;
$inputs = array (
@$fusion,
);
foreach($inputs as $input) {
var_dump(json_encode($input));
}Resulted in this output:
object(B)#1 (1) {
["prop"]=>
int(42)
}
Zend/zend_hash.h:1629:20: runtime error: member access within misaligned address 0x0000000000b1 for type 'zend_string' (aka 'struct _zend_string'), which requires 8 byte alignment
0x0000000000b1: note: pointer points here
<memory cannot be printed>
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior Zend/zend_hash.h:1629:20
PHP Version
nightly
Operating System
No response
Reacted by Christoph M. Becker
Activity
cmb69 commentedon Dec 17, 2024
Slightly simplified reproducer:
Looks like both
var_dump()andjson_encode()are required to trigger this.Seems to be related to property hooks, so maybe @iluuu1994 will have a look.
iluuu1994 commentedon Dec 17, 2024
Good grief, how does this code still have bugs 😭 I'll have a look.