PHP Catchable fatal error with 2.8.0

[ipoweb]

Hi,
with last version, i get an error

PHP Catchable fatal error: Argument 1 passed to QM_Output_Html_Assets::dependency_row() must be an instance of _WP_Dependency, boolean given, called in /httpdocs/wp-content/plugins/query-monitor/output/html/assets.php on line 105 and defined in /httpdocs/wp-content/plugins/query-monitor/output/html/assets.php on line 113

[johnbillion]

Thanks @sireneweb, can you try deactivating your plugins one by one to see if you can determine which plugin is causing the problem and then let me know? It might also be your theme, in which case please let me know which theme you're using.

Thanks.

[jemdev]

Hi,
I've got another error with this version at the end of updating process : message shown is as following :
Fatal error: Class QM_Output_Html cannot extend from interface QM_Output in ....\wp-content\plugins\query-monitor\output\Html.php on line 211

I've not checked the code to find the source of the error. Hope this may help.

[johnbillion]

@jemdev The fatal error during update is a known issue and is not something I'll be fixing. It's due to the fact that QM hooks into the shutdown hook which runs after the plugin update, so you get some code which loads before the plugins gets updated, and some code which loads after it, and thus you get a fatal error if the structure of some of the classes have been changed.

[johnbillion]

@sireneweb Any news?

[johnbillion]

Turns out this happens under a particularly specific situation where a footer-enqueued asset is deregistered later in the page. Example:

add_action( 'wp_enqueue_scripts', function() {
    wp_enqueue_script( 'foo', 'http://example.com/example.js' );
} );

add_action( 'wp_print_footer_scripts', function() {
    wp_deregister_script( 'foo' );
} );