[Issue] Avoid divide-by-zero fatal error

[m2-assistant]

This issue is automatically created based on existing pull request: #37479: Avoid divide-by-zero fatal error

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Description

While working on Ethan3600/magento2-CronjobManager#122, I noticed that providing asking Magento to validate a cron expression which contains /0 resulted in a Fatal error, rather than an exception which I could catch. This pull request fixes the divide-by-zero bug and instead produces a sensible exception. Includes unit test.

Manual testing scenarios

1. Call \Magento\Cron\Model\Schedule::matchCronExpression('0/0', 0)

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)
• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)

[github-jira-sync-bot]

Unfortunately, not enough information was provided to create a Jira ticket. Please make sure you added the following label(s): Reproduced on 2.4.x, ^Area:.*

Once all required labels are present, please add Issue: Confirmed label again.

[github-jira-sync-bot]

✅ Jira issue https://jira.corp.adobe.com/browse/AC-9207 is successfully created for this GitHub issue.

[m2-assistant]

✅ Confirmed by @engcom-Echo. Thank you for verifying the issue.
Issue Available: @engcom-Echo, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.