[wp-trac] [WordPress Trac] #44809: Safeguard `has_errors()` check in extra Customizer validation

[WordPress Trac]

#44809: Safeguard `has_errors()` check in extra Customizer validation
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 Reporter:  flixos90               |       Owner:  flixos90
     Type:  defect (bug)           |      Status:  closed
 Priority:  normal                 |   Milestone:  4.9.9
Component:  Customize              |     Version:  4.7
 Severity:  normal                 |  Resolution:  fixed
 Keywords:  has-patch fixed-major  |     Focuses:
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Changes (by SergeyBiryukov):

 * status:  reopened => closed
 * resolution:   => fixed


Comment:

 In [changeset:"43619" 43619]:
 {{{
 #!CommitTicketReference repository="" revision="43619"
 Customize: Safeguard a check on the `customize_validate_{$setting_id}`
 filter value to ensure it is a `WP_Error`.

 While the filter is documented to only support a `WP_Error`, it has been a
 common practice to return true in a validation function if no errors have
 occurred. This was already caught when the same filter was executed in
 `WP_Customize_Setting`, it was however missing in
 `WP_Customize_Manager::validate_setting_values()`.

 Props flixos90.
 Merges [43578] to the 4.9 branch.
 Fixes #44809.
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/44809#comment:5>
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