[wp-trac] [WordPress Trac] #36559: Using "widget" as part of setting title breaks the customizer since 4.5

[WordPress Trac]

#36559: Using "widget" as part of setting title breaks the customizer since 4.5
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 Reporter:  steven_gardner  |       Owner:
     Type:  defect (bug)    |      Status:  new
 Priority:  normal          |   Milestone:  Awaiting Review
Component:  Customize       |     Version:  4.5
 Severity:  normal          |  Resolution:
 Keywords:                  |     Focuses:
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Comment (by westonruter):

 @steven_gardner hi. It's not actually a duplicate, but just that it came
 up in conversation recently.

 A potential solution to help avoid this problem in the first place is to
 change logic in `\WP_Customize_Widgets::get_setting_args()` to check if
 the matched `id_base` pattern in the regular expression
 `^widget_(?P<id_base>.+?)(?:\[(?P<widget_number>\d+)\])?$` actually
 corresponds to the ID base of a registered widget.

 The immediate fix is to just not use `widget_` as the prefix in your
 Customizer settings/controls, and this is what I'm going to update the
 Customizer API documentation to make note of, that the `widget_` prefix is
 reserved for actual widgets.

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Ticket URL: <https://core.trac.wordpress.org/ticket/36559#comment:3>
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