[wp-trac] [WordPress Trac] #21511: Fatal error when upgrading from older versions

[WordPress Trac]

#21511: Fatal error when upgrading from older versions
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 Reporter:  SergeyBiryukov   |       Owner:
     Type:  defect (bug)     |      Status:  new
 Priority:  normal           |   Milestone:  3.4.2
Component:  Upgrade/Install  |     Version:  3.3
 Severity:  normal           |  Resolution:
 Keywords:  has-patch        |
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Comment (by nacin):

 We should clarify these restrictions with code comments.

 This isn't a unique problem — admin-footer.php, for example, has a
 function_exists() call before calling get_site_option().

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Ticket URL: <http://core.trac.wordpress.org/ticket/21511#comment:2>
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