[Issue] MessageValidator fails on hash arrays that dont have 0 element

[m2-assistant]

This issue is automatically created based on existing pull request: #30521: MessageValidator fails on hash arrays that dont have 0 element

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Magento\Framework\MessageQueue\Test\Unit\MessageValidatorTest::testInvalidMessageType with data set #11 (array('object_interface', 'Magento\Customer\Api\Data\Cus...face[]'), array(23, 545), 'Data in topic "topic" must be...e[]". ')
PHPUnit\Framework\Exception: Notice: Undefined offset: 0 in /magento/lib/internal/Magento/Framework/MessageQueue/MessageValidator.php:157.

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)

[magento-engcom-team]

Hi @m2-assistant[bot]. Thank you for your report.
The issue has been fixed in #30521 by @kandy in 2.4-develop branch
Related commit(s):

• d0249eecfd93e9d5725c77b31c76f31c3f08c6c9

The fix will be available with the upcoming 2.4.2 release.