Const expr FCC crashes under preloading

[arnaud-lb]

Description

The following code:

// preload.inc

#[Attribute]
class A {
 function __construct(public mixed $fn) {}
}

#[A(strlen(...))]
class C {
 const CC = strlen(...);

 #[A(strlen(...))]
 function f($arg = strlen(...)) {
 return $arg;
 }
}

const CC = strlen(...);

// preload.php

echo "# Class const\n";
var_dump((C::CC)('hello'));
echo "# Class attr\n";
var_dump((new ReflectionClass(C::class)->getAttributes(A::class)[0]->newInstance()->fn)('hello'));
echo "# Method attr\n";
var_dump((new ReflectionMethod(C::class, 'f')->getAttributes(A::class)[0]->newInstance()->fn)('hello'));
echo "# Method default value\n";
var_dump((new C()->f())('hello'));

When executed with

$ php -d opcache.enable_cli=1 -d opcache.preload=preload.inc preload.php

Resulted in two issues:

• Preloading evaluates class constants during compilation, but FCCs evaluate to objects, which can't be persisted
• zend_fcc_ast->fptr is allocated with ZEND_MAP_PTR_NEW during compilation, which results in map ptr collisions later

PHP Version

PHP 8.5

Operating System

No response