[wp-trac] [WordPress Trac] #40787: REST API: Attempts to output headers without confirming headers have not been sent

[WordPress Trac]

#40787: REST API: Attempts to output headers without confirming headers have not
been sent
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 Reporter:  kraftbj                 |       Owner:  jnylen0
     Type:  defect (bug)            |      Status:  assigned
 Priority:  normal                  |   Milestone:  4.8
Component:  REST API                |     Version:
 Severity:  normal                  |  Resolution:
 Keywords:  has-patch dev-feedback  |     Focuses:  rest-api
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Comment (by rmccue):

 Makes sense to only send if `! headers_sent()`

 Deprecated information is still useful for reporting internally-deprecated
 things (it was intended to be a permanent change), but I'd say we should
 follow the regular `trigger_error` behaviour and only send when `WP_DEBUG`
 is on.

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Ticket URL: <https://core.trac.wordpress.org/ticket/40787#comment:8>
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