[wp-trac] [WordPress Trac] #47265: Uncaught Error: Call to undefined function load_default_textdomain() in /wp-includes/class-wp-fatal-error-handler.php:41

[WordPress Trac]

#47265: Uncaught Error: Call to undefined function load_default_textdomain() in
/wp-includes/class-wp-fatal-error-handler.php:41
----------------------------+-----------------------------
 Reporter:  daxelrod        |      Owner:  (none)
     Type:  defect (bug)    |     Status:  new
 Priority:  normal          |  Milestone:  Awaiting Review
Component:  Bootstrap/Load  |    Version:
 Severity:  normal          |   Keywords:
  Focuses:                  |
----------------------------+-----------------------------
 Noticed this error after updating to WP 5.2 on PHP 7.3. This error may be
 related to errors thrown in caching plugins, or other drop-ins which
 execute and error early.

 My error was thrown after a fatal error in WP Redis:
 > Uncaught RedisException: Connection timed out

 I Googled to see if anything had been written on this issue and found a
 completely separate live website presenting the same error (I am not
 associated with this website): http://masacoat-asahi.com/

 > Fatal error: Uncaught Error: Call to undefined function mysql_connect()
 in /home/sites/heteml/users/h/u/b/hubstyle/web/masacoat-asahi.com/wp-
 content/advanced-cache.php:106 Stack trace: #0
 /home/sites/heteml/users/h/u/b/hubstyle/web/masacoat-asahi.com/wp-content
 /advanced-cache.php(184): SiteManagerAdvancedCache->__construct() #1
 /home/sites/heteml/users/h/u/b/hubstyle/web/masacoat-asahi.com/wp-
 settings.php(95): include('/home/sites/het...') #2
 /home/sites/heteml/users/h/u/b/hubstyle/web/masacoat-asahi.com/wp-
 config.php(85): require_once('/home/sites/het...') #3
 /home/sites/heteml/users/h/u/b/hubstyle/web/masacoat-asahi.com/wp-
 load.php(37): require_once('/home/sites/het...') #4
 /home/sites/heteml/users/h/u/b/hubstyle/web/masacoat-asahi.com/wp-blog-
 header.php(13): require_once('/home/sites/het...') #5
 /home/sites/heteml/users/h/u/b/hubstyle/web/masacoat-
 asahi.com/index.php(17): require('/home/sites/het...') #6 {main} thrown in
 /home/sites/heteml/users/h/u/b/hubstyle/web/masacoat-asahi.com/wp-content
 /advanced-cache.php on line 106
 >
 > Fatal error: Uncaught Error: Call to undefined function
 load_default_textdomain() in /home/sites/heteml/users/h/u/b/hubstyle/web
 /masacoat-asahi.com/wp-includes/class-wp-fatal-error-handler.php:41 Stack
 trace: #0 [internal function]: WP_Fatal_Error_Handler->handle() #1 {main}
 thrown in /home/sites/heteml/users/h/u/b/hubstyle/web/masacoat-asahi.com
 /wp-includes/class-wp-fatal-error-handler.php on line 41

 It appears this code was introduced in #47093 (changeset 45277) to fix an
 issue with recovery mode emails locale.

 Suggest a conditional for if locale is not defined yet.

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Ticket URL: <https://core.trac.wordpress.org/ticket/47265>
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