Deactivating parent plugin of Addon crashes site

[majick777]

🐞 bug report

Behavior:

• What is the issue? (*)

So I had a weird one today as I was testing our Pro version as an Addon:

Fatal error: Call to a member function is_migration() on a non-object in C:!WP\InstantWP_4.5\iwpserver\htdocs\wordpress\wp-content\plugins\radio-station-pro\freemius\includes\class-freemius.php on line 13449

which is: $this->get_parent_instance()->is_migration(); where get_parent_instance() = self::get_instance_by_id( $this->_plugin->parent_plugin_id );

So specifying a parent ID in an Addon Freemius instance, when you deactivate the parent plugin, the Freemius instance doesn't exist for it, so it is a non-object and causes a crash.

• What is the expected behavior? Freemius should fail gracefully, not crash in this instance, which prevents admin access until the Addon is deactivated.

Versions: (*)

• Freemius SDK Version: 2.4.3
• WordPress Version: 5.9.2
• PHP Version: 7.4