add_meta_box() ignores calls with invalid $priority parameter

[bobbingwide]

I incorrectly changed a call to add_meta_box() to adjust the $priority - I used a valid value for the $context parameter.

Actual result:
The meta box callback was not invoked at all

Expected result:
Some form of validation, which would produce one or more of the following

• Doing it wrong
• WP_Error returned from the call
• return( false );

[DrewAPicture]

Hi @bobbingwide, could you please provide some sample code to reproduce this issue?

[bobbingwide]

This is what I should have had

add_meta_box( 'oik_clone', __( "Clone on update", "oik"), 'oik_clone_box', null, 'side', 'default'  );

This is what had by mistake

add_meta_box( 'oik_clone', __( "Clone on update", "oik"), 'oik_clone_box', null, null, 'side'  );

[wonderboymusic]

add_meta_box() is low-level enough, the code is pretty clear with what it supports for priority ('high', 'core', 'default', 'low') - not inclined to add extra debugging logic here.