Null can not be used as a standalone type in Paypal Braintree Core

[GrimLink]

Preconditions and environment

• Magento 2.4.7
• MacOS 14.5 running on Laravel Valet

Steps to reproduce

Run bin/magento setup:di:compile after a very short moment the following error is thrown:

Fatal error: Null can not be used as a standalone type in /vendor/paypal/module-braintree-core/Plugin/DeleteStoredPaymentPlugin.php on line 57

Expected result

No errors

Actual result

Fatal error: Null can not be used as a standalone type in /vendor/paypal/module-braintree-core/Plugin/DeleteStoredPaymentPlugin.php on line 57

Additional information

No response

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @GrimLink. Thank you for your report.
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[nuwaus]

I have the same issue too, after upgrading to 2.4.7

[hostep]

What version of PHP are you guys using? Is it 8.1? Because standalone type of null is only supported in PHP 8.2 and higher.

I can confirm that the paypal/braintree module is using null as a return type, despite its composer constraints stating it's compatible with PHP 8.1: "php": "~8.1.0||~8.2.0||~8.3.0",

So this is a valid bug report, the people who maintain the paypal/braintree module should fix this.

Quick fix would be to switch to PHP 8.2 or 8.3

[nuwaus]

What version of PHP are you guys using? Is it 8.1? Because standalone type of null is only supported in PHP 8.2 and higher.

I can confirm that the paypal/braintree module is using null as a return type, despite its composer constraints stating it's compatible with PHP 8.1: "php": "~8.1.0||~8.2.0||~8.3.0",

So this is a valid bug report, the people who maintain the paypal/braintree module should fix this.

Quick fix would be to switch to PHP 8.2 or 8.3

I'm currently on PHP 8.1

I will try switching the PHP version.

Thank you

[GrimLink]

@hostep I am also using php 8.1, also why I am reporting this 😉

[m2-assistant]

Hi @engcom-November. Thank you for working on this issue.
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[engcom-November]

Hello @GrimLink,

Thank you for the report and collaboration!

Verified this on 2.4-develop branch.
When running bin/magento setup:di:compile with php 8.1 installed we are getting the below error:

Fatal error:  Null can not be used as a standalone type in /opt/homebrew/var/www/magento8/app/code/PayPal/Braintree/Plugin/DeleteStoredPaymentPlugin.php on line 57

Hence confirming the issue.

Thank you.