[wp-trac] [WordPress Trac] #29743: warning with join in nav-menu-template.php (L 98) when apply_filters nav_menu_css_class return null

[WordPress Trac]

#29743: warning with join in nav-menu-template.php (L 98) when apply_filters
nav_menu_css_class return null
----------------------------+--------------------------
 Reporter:  eadoking        |       Owner:  johnbillion
     Type:  task (blessed)  |      Status:  assigned
 Priority:  normal          |   Milestone:  4.1
Component:  Menus           |     Version:  trunk
 Severity:  normal          |  Resolution:
 Keywords:  needs-patch     |     Focuses:
----------------------------+--------------------------
Changes (by johnbillion):

 * keywords:  has-patch => needs-patch
 * owner:  markjaquith => johnbillion
 * status:  reopened => assigned
 * type:  enhancement => task (blessed)


Comment:

 I would like to revert r30032. I agree with Sergey that this is a
 developer error and the warning is appropriate.

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Ticket URL: <https://core.trac.wordpress.org/ticket/29743#comment:6>
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