Sync: Bug fix checksum histogram loop when max range is PHP_INT_MAX

[darssen]

When performing a checksum_histogram if $ids_range['max_range'] was PHP_INT_MAX the addition of 1 and comparison at the end was creating an infinite loop n the do_while clause.

Proposed changes:

• If the $ids_range['max_range'] is PHP_INT_MAX, ensure we break the loop since we have checked the highest id in the table.

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

Does this pull request change what data or activity we track or use?

Testing instructions:

• This can be tested in the remote site by manually adding a post in the DB with PHP_INT_MAX, but since it is already happening in wpcom as well for some sites, I'll add details on how to test in https://github.com/Automattic/vulcan/issues/579

[github-actions]

Are you an Automattician? Please test your changes on all WordPress.com environments to help mitigate accidental explosions.

• To test on WoA, go to the Plugins menu on a WordPress.com Simple site. Click on the "Upload" button and follow the upgrade flow to be able to upload, install, and activate the Jetpack Beta plugin. Once the plugin is active, go to Jetpack > Jetpack Beta, select your plugin, and enable the update/checksum-histogram-max-range-php-int-max branch.

  • For jetpack-mu-wpcom changes, also add define( 'JETPACK_MU_WPCOM_LOAD_VIA_BETA_PLUGIN', true ); to your wp-config.php file.

• To test on Simple, run the following command on your sandbox:

  bin/jetpack-downloader test jetpack update/checksum-histogram-max-range-php-int-max
  

  bin/jetpack-downloader test jetpack-mu-wpcom-plugin update/checksum-histogram-max-range-php-int-max
  

Interested in more tips and information?

• In your local development environment, use the jetpack rsync command to sync your changes to a WoA dev blog.
• Read more about our development workflow here: PCYsg-eg0-p2
• Figure out when your changes will be shipped to customers here: PCYsg-eg5-p2

[github-actions]

Thank you for your PR!

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