[wp-trac] [WordPress Trac] #27815: PHP Warning during Background updates w/ Themes

[WordPress Trac]

#27815: PHP Warning during Background updates w/ Themes
-----------------------------+-----------------
 Reporter:  dd32             |      Owner:
     Type:  defect (bug)     |     Status:  new
 Priority:  normal           |  Milestone:  3.9
Component:  Upgrade/Install  |    Version:
 Severity:  normal           |   Keywords:
  Focuses:                   |
-----------------------------+-----------------
 The following warning is triggered during background updates if there are
 any theme updates available and the site has multiple theme directories
 registered.
 {{{
 PHP Warning:  Illegal offset type in isset or empty in wp-
 includes/theme.php on line 614
 }}}

 This is caused by passing the update object to get_theme_root() instead of
 the theme slug, when there's only 1 theme directory registered (The
 default one) the function returns early and doesn't look at the theme slug
 provided, if there are multiple directories however, it treats the slug as
 a string and hits the above warning.

 When the warning is hit, the default theme directory is returned, so all
 updates were still flowing despite the warning.

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Ticket URL: <https://core.trac.wordpress.org/ticket/27815>
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