di:setup:compile fails with anonymous classes

[YevSent]

Preconditions (*)

The current implementation of \Magento\Setup\Module\Di\Code\Scanner\PhpScanner does not support classes that contain anonymous classes. This leads to failures for di:setup:compile command. The problem that PhpScanner treats anonymous classes as classes that might require code generation for factories and extension attributes.

All Magento versions have this issue.

Steps to reproduce (*)

1. Create a dummy class which contains an anonymous class, like Magento\DummyModule\Dummy (see a sample below)
2. Run bin/magento setup:di:compile CLI command

Expected result (*)

1. Compilation is successful

Actual result (*)

1. Compilation fails with an error Class \Magento\DummyModule\$arg does not exist

Sample class:

namespace Magento\DummyModule;

class Dummy
{
    public function execute($arg)
    {
        return new class($arg) {
            private $arg;

            public function __construct($arg)
            {
                $this->arg = $arg;
            }

            public function serialize()
            {
                return (string) $this->arg;
            }
        };
    }
}

To achieve the same error as described in #21555, the anonymous class should not provide a possibility to specify arguments for a constructor. In simple words, return new class {.

[m2-assistant]

Hi @joni-jones. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

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Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.4-develop instance - upcoming 2.4.x release

For more details, please, review the Magento Contributor Assistant documentation.

@joni-jones do you confirm that you were able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

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[m2-assistant]

Hi @joni-jones. Thank you for working on this issue.
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[slavvka]

Hi @joni-jones. Thank you for your report.
The issue has been fixed in #26533 by @joni-jones in 2.4-develop branch
Related commit(s):

• fd3f2a22b8e5b2cffaf17daccc29f461c26c5f51
• 136d5592244d05509ad0b3b9117505d8f833ddfa
• 25fd9259e72bc484f5899aa4edf3de120b66db0c
• e165d99f5994af39d49ed70155c003745158e5db

The fix will be available with the upcoming 2.4.0 release.