[wp-trac] [WordPress Trac] #41743: Using the_widget on a widget that has not been registered results in an undefined index notice.

[WordPress Trac]

#41743: Using the_widget on a widget that has not been registered results in an
undefined index notice.
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 Reporter:  SeBsZ                     |       Owner:
     Type:  defect (bug)              |      Status:  new
 Priority:  normal                    |   Milestone:  4.9
Component:  Widgets                   |     Version:  2.8
 Severity:  normal                    |  Resolution:
 Keywords:  good-first-bug has-patch  |     Focuses:
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Comment (by SeBsZ):

 I also agree, hence the reason my very first line in this ticket was:
 {{{
 First of all, this may be by design to notify the developer that they've
 probably made a mistake.
 }}}

 The reason I came across these notifications is my plugin was correctly
 registering and using, but another plugin (Yoast SEO) uses this call in
 certain situations:
 {{{#!php
 <?php
 remove_all_actions( 'widgets_init' );
 }}}

 Which led to my widgets not being registered when I tried to use them and
 that's how I first encountered the undefined index notice. I'm only saying
 this to explain that sometimes this isn't a mistake by a developer per se,
 but could be because of another plugin's incorrect behavior.

 I do agree a {{{_doing_it_wrong()}}} is better than failing silently, so
 at least a developer will know something is wrong.

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Ticket URL: <https://core.trac.wordpress.org/ticket/41743#comment:10>
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