OpenSSL oid_file path check warning contains uninitialized path

[bukka]

Description

Due to bug in the error message creation that is used in oid_file check, the uninitialized real_path is printed. It doesn't really make much sense to print the path as the invalid one is either too long or contains \0 character

The following code:

<?php
$configFile = __DIR__ . '/custom.cnf';
file_put_contents($configFile, sprintf("oid_file = %s\n",  __DIR__ . '/' . str_repeat('a', 9000)));
$pkey = openssl_pkey_new([ 'config' => $configFile ]);

Resulted in this output:

PHP Warning:  openssl_pkey_new(): Path '�h,�' for oid_file option must be a valid file path in ...

But I expected this output instead:

PHP Warning:  openssl_pkey_new(): Path for oid_file option must be a valid file path in ...

PHP Version

PHP 8.0

Operating System

Linux