[wp-trac] [WordPress Trac] #59712: `WP_Ugrader` doesn't check source and destination variable types, is missing a string.

[WordPress Trac]

#59712: `WP_Ugrader` doesn't check source and destination variable types, is
missing a string.
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 Reporter:  peterwilsoncc                        |       Owner:
                                                 |  peterwilsoncc
     Type:  defect (bug)                         |      Status:  assigned
 Priority:  normal                               |   Milestone:  6.6
Component:  Upgrade/Install                      |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch has-unit-tests needs-      |     Focuses:
  testing                                        |
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Comment (by peterwilsoncc):

 Good catch, Andy, I've used your suggestion and pushed it with some
 additional test cases.

 It's possibly a little overkill but if WordPress is going to test for
 invalid strings, it should at least do it completely.

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Ticket URL: <https://core.trac.wordpress.org/ticket/59712#comment:10>
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