Files
wordpress/wp-admin/includes
hellofromTonya 1f608d5d5c Upgrade/Install: Deactivate the Gutenberg plugin if its version is 11.8 or lower.
Avoid a fatal error due to `WP_Theme_JSON_Schema` and potentially other classes and/or functions redeclarations when updating to WordPress 5.9 with an incompatible version of the Gutenberg plugin.

This commit uses the same strategy from 5.8. Moves the plugin deactivation code (introduced in [51266]) to a private function for reuse in 5.8, 5.9, and future major releases.

Follow-up to [51180], [51266].

Props hellofromTonya, johnbillion, jorbin.
See #54405.
Built from https://develop.svn.wordpress.org/trunk@52165


git-svn-id: http://core.svn.wordpress.org/trunk@51757 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-11-15 19:59:03 +00:00
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