[wp-trac] [WordPress Trac] #56219: Importer plugin's PHPUnit tests fail on PHP 8.1

[WordPress Trac]

#56219: Importer plugin's PHPUnit tests fail on PHP 8.1
---------------------------+-----------------------------
 Reporter:  antonvlasenko  |      Owner:  (none)
     Type:  defect (bug)   |     Status:  new
 Priority:  normal         |  Milestone:  Awaiting Review
Component:  Plugins        |    Version:  trunk
 Severity:  normal         |   Keywords:
  Focuses:                 |
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 Steps to reproduce this bug:
 1. Make sure you are on PHP 8.1
 2. Install the importer plugin from the official repository:
 https://github.com/WordPress/wordpress-importer
 3. Install composer dependencies (you might have to use --ingore-platform-
 reqs option).
 4. Run test suite that is shipped with the importer plugin.

 Expected result:
 All PHPUnit tests pass.

 Actual result:
 PHPUnit tests fail with this error message:

 {{{
 PHP Fatal error:  During inheritance of ArrayAccess: Uncaught Return type
 of Requests_Cookie_Jar::offsetExists($key) should either be compatible
 with ArrayAccess::offsetExists(mixed $offset): bool, or the
 #[\ReturnTypeWillChange] attribute should be used to temporarily suppress
 the notice ...
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/56219>
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