[wp-trac] [WordPress Trac] #42184: Customizer theme install getting stuck on downloading

[WordPress Trac]

#42184: Customizer theme install getting stuck on downloading
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 Reporter:  helen         |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  4.9
Component:  Customize     |     Version:  trunk
 Severity:  normal        |  Resolution:
 Keywords:  needs-patch   |     Focuses:
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Changes (by westonruter):

 * keywords:   => needs-patch
 * milestone:  Awaiting Review => 4.9


Comment:

 I was able to reproduce this a couple times when I was hacking around
 trying to force an `unable_to_connect_to_filesystem` error when calling
 `wp_ajax_install_theme()`. I think it has something to do with
 `wp.updates.maybeRequestFilesystemCredentials()`, and the
 `wp.updates.ajaxLocked` and
 `wp.updates.shouldRequestFilesystemCredentials` flags. I think it assumes
 a prompt is being shown to enter credentials, but I've never seen this
 appear. Maybe it ''is'' actually being shown but it is hidden behind the
 Customizer UI thanks to z-index issues?

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Ticket URL: <https://core.trac.wordpress.org/ticket/42184#comment:2>
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