[wp-trac] [WordPress Trac] #47855: PHPMailer::validateAddress() fails on PHP 7.3 with libpcre2 < 10.32

[WordPress Trac]

#47855: PHPMailer::validateAddress() fails on PHP 7.3 with libpcre2 < 10.32
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 Reporter:  yolabingo     |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Mail          |    Version:  5.2.2
 Severity:  minor         |   Keywords:
  Focuses:                |
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 Due to a bug in libpcre2 < 10.32-RC1
 https://bugs.exim.org/show_bug.cgi?id=2300,
 this email regex validation fails in PHP 7.3 with PCRE_VERSION < 10.32.
 One consequence of this is being unable to send a password reset link from
 the login page - the user sees the error
 "The email could not be sent. Possible reason: your host may have disabled
 the mail() function."

 A simple test script
 https://gist.github.com/yolabingo/68b4f037661e702742c5abb324a3d992

 PHP < 7.3 uses libpcre 8.x
 PHP 7.3 uses libpcre2 10.x

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Ticket URL: <https://core.trac.wordpress.org/ticket/47855>
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