[wp-trac] [WordPress Trac] #64315: Running `_wp_cron()` on shutdown breaks `ALTERNATE_WP_CRON`

[WordPress Trac]

#64315: Running `_wp_cron()` on shutdown breaks `ALTERNATE_WP_CRON`
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 Reporter:  karl94        |       Owner:  westonruter
     Type:  defect (bug)  |      Status:  accepted
 Priority:  normal        |   Milestone:  6.9
Component:  Cron API      |     Version:  trunk
 Severity:  major         |  Resolution:
 Keywords:                |     Focuses:
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Changes (by westonruter):

 * status:  assigned => accepted


Comment:

 Thank you. I was able to reproduce this issue.

 1. I added `define( 'ALTERNATE_WP_CRON', true );` to my `wp-config.php`.
 2. I scheduled a post to publish in one minute.
 3. I loaded the frontend after the scheduled publish time, and in the
 footer (and in the error log) I saw:

 >  PHP Warning:  Cannot modify header information - headers already sent
 by (output started at /var/www/src/wp-includes/template-canvas.php:13) in
 /var/www/src/wp-includes/pluggable.php on line 1534

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Ticket URL: <https://core.trac.wordpress.org/ticket/64315#comment:3>
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