[wp-trac] [WordPress Trac] #25860: Copy version.php last during updates

[WordPress Trac]

#25860: Copy version.php last during updates
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 Reporter:  dd32             |      Owner:
     Type:  defect (bug)     |     Status:  new
 Priority:  normal           |  Milestone:  Awaiting Review
Component:  Upgrade/Install  |    Version:
 Severity:  normal           |   Keywords:  needs-patch
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 Sometimes when updating, the process fails mid-way due to circumstances
 out of our control.

 In some cases, `version.php` may be copied before the error occurs, when
 this happens WordPress believes that it's `$new_version` rather than the
 previous version.

 We should instead, only copy `version.php` over last, so as to ensure that
 we don't end up in that situation.

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Ticket URL: <http://core.trac.wordpress.org/ticket/25860>
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