[wp-trac] [WordPress Trac] #52460: Error 502 since upgrade to 5.6.1 with PHP 8 in Admin or Login Area

[WordPress Trac]

#52460: Error 502 since upgrade to 5.6.1 with PHP 8 in Admin or Login Area
-----------------------------------+------------------------------
 Reporter:  torstensbuechereckede  |       Owner:  (none)
     Type:  defect (bug)           |      Status:  new
 Priority:  normal                 |   Milestone:  Awaiting Review
Component:  General                |     Version:  5.6.1
 Severity:  normal                 |  Resolution:
 Keywords:                         |     Focuses:
-----------------------------------+------------------------------

Comment (by torstensbuechereckede):

 Some additional information:
 I have removed all plugins from plugin folder - no effect.

 I have checked the logs from Php 8.0:
 [07-Feb-2021 00:26:00] WARNING: [pool www] child 3546610 exited on signal
 11 (SIGSEGV - core dumped) after 10229.739266 seconds from start
 [07-Feb-2021 00:26:00] NOTICE: [pool www] child 3674842 started

 Nginx log:
 2021/02/07 00:26:00 [error] 2468#0: *3584 recv() failed (104: Connection
 reset by peer) while reading response header from upstream, client:
 192.168.181.2, server: od.torstens-buecherecke.de, request: "GET /wp-
 admin/about.php?updated HTTP/2.0", upstream:
 "fastcgi://unix:/run/php/php8.0-fpm.sock:", host: "od.torstens-
 buecherecke.de", referrer: "https://od.torstens-buecherecke.de/wp-admin
 /update-core.php?action=do-core-upgrade"

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/52460#comment:1>
WordPress Trac <https://core.trac.wordpress.org/>
WordPress publishing platform