New term.php is showing warning for rearranged columns using manage_{$screen->id}_columns filter

[wzislam]

Main Issue:

Declared custom column and sorted them using unset() for my Custom Taxonomy for CPT:

<?php
function mytax_icon_column( $columns ) {
    unset( $columns['cb'] );
    unset( $columns['name'] );

    $new_columns = array();
    $new_columns['cb']      = $columns['cb'];
    $new_columns['name']    = $columns['name'];
    $new_columns['icon']    = 'Icon';
    return array_merge( $new_columns, $columns );
}
add_filter( 'manage_edit-mytax_columns', 'mytax_icon_column' );

and in the Term edit page (/term.php?taxonomy=mytax&tag_ID=224&post_type=cpt&wp_http_referer=%2Fwp-admin%2Fedit-tags.php%3Ftaxonomy%3Dmytax%26post_type%3Dcpt) it's displaying

Notice: Undefined index: cb in /home/path/public_html/path/wp-content/plugins/myplugin/plugin-file.php on line 240
Notice: Undefined index: name in /home/path/public_html/path/wp-content/plugins/myplugin/plugin-file.php on line 241

But it's not showing any warning message in earlier version (i.e. 4.5.2) where term's using edit-tags.php.

Secondary Issue:

When I edit a term, under the Screen Options there are checkboxes denoting columns. But where are the columns? The checkboxes has no effect on this particular screen. They are good fit for the Term listing page only.

Can we sort these out?

[wzislam]

Screen Options showing "Columns" checkboxes without any column in this UI

[SergeyBiryukov]

and in the Term edit page (/term.php?taxonomy=mytax&tag_ID=224&post_type=cpt&wp_http_referer=%2Fwp-admin%2Fedit-tags.php%3Ftaxonomy%3Dmytax%26post_type%3Dcpt) it's displaying

Notice: Undefined index: cb in /home/path/public_html/path/wp-content/plugins/myplugin/plugin-file.php on line 240
Notice: Undefined index: name in /home/path/public_html/path/wp-content/plugins/myplugin/plugin-file.php on line 241

The warning is correct, you're trying to use the array items you've just unset.

When I edit a term, under the Screen Options there are checkboxes denoting columns. But where are the columns? The checkboxes has no effect on this particular screen. They are good fit for the Term listing page only.

It's already fixed in #34988, can't reproduce on a clean 4.5.3 install. Make sure all the files are properly updated.

[ocean90]

Sounds like a duplicate of #36893.

[wzislam]

But the warning never appeared in 3.5, it's showing while using the term.php, and I'm adding the columns again... so ultimately they exists, na?