[wp-trac] [WordPress Trac] #33442: Widgets not displayed if no $instance data is set

[WordPress Trac]

#33442: Widgets not displayed if no $instance data is set
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 Reporter:  johnnyb       |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  4.3.1
Component:  Widgets       |     Version:  4.3
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by GregRoss):

 @westonruter I don't disagree that it's dangerous, just that it worked
 previously :)

 I agree reverting to `array_key_exists()` makes the most sense and
 restores the previous behaviour.

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Ticket URL: <https://core.trac.wordpress.org/ticket/33442#comment:8>
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