The first time around they probably did. I couldn’t even get the install interface to run (it was already a blank page), and I asked them to perform the command prompt operation instead (we’re on a cPanel account).
Now, according to the support staff person who live-chatted with me, the operation was successful. They didn’t mention any errors and did not send me the command output. But the site remained blank. After that, when I asked what might be the problem, they did write explicitly that the error log was empty, but not anything about the command output.
I doubt it that they saved the original command output anywhere, though could ask.
Later on, when I made a couple more upgrade attempts, the install interface did go up, and I used the upgrade option on that. That led me to the already-familiar blank page, no output. I didn’t ask them if they had an error log generated for this.
[Edit: At this point I got mixed up, and started writing about error logs instead of command outputs, so the rest is probably irrelevant to your question, but I’m still keeping the info in for the odd chance it’s useful in any way]
Looking at the cPanel error tool, I see a bunch of errors. I’m pasting in the log, if that helps:
[Sun Jan 05 02:28:28.501109 2020] [:error] [pid 8828] [client 58.54.28.31:51228] PHP Fatal error: Call to a member function getBestGalleyId() on a non-object in /home/ludsocie/public_html/journal/plugins/generic/usageEvent/UsageEventPlugin.inc.php on line 245
[Sat Jan 04 22:59:20.357683 2020] [:error] [pid 51297] [client 40.77.167.122:5722] PHP Fatal error: Call to a member function getRequest() on a non-object in /home/ludsocie/public_html/journal/plugins/generic/usageStats/UsageStatsPlugin.inc.php on line 223
[Sat Jan 04 21:31:42.080113 2020] [:error] [pid 16699] [client 47.111.229.241:58767] File does not exist: /home/ludsocie/public_html/journal/public/router.php
[Sat Jan 04 13:51:19.082836 2020] [:error] [pid 33604] [client 66.187.71.78:59000] File does not exist: /home/ludsocie/public_html/journal/wp-login.php, referer: http://www.ludjournal.org/
[Sat Jan 04 11:52:51.774801 2020] [:error] [pid 39303] [client 125.214.57.90:65015] File does not exist: /home/ludsocie/public_html/journal/wp-login.php, referer: http://www.ludjournal.org/wp-login.php?action=register
[Sat Jan 04 11:52:51.109343 2020] [:error] [pid 39308] [client 125.214.57.90:54234] File does not exist: /home/ludsocie/public_html/journal/wp-login.php, referer: http://www.ludjournal.org/
[Fri Jan 03 23:59:10.973995 2020] [:error] [pid 56206] [client 115.124.115.69:50503] Cannot read configuration file /home/ludsocie/public_html/journal/config.inc.php
[Fri Jan 03 23:59:07.011883 2020] [:error] [pid 56206] [client 115.124.115.69:50503] Cannot read configuration file /home/ludsocie/public_html/journal/config.inc.php
[Fri Jan 03 23:28:06.842541 2020] [:error] [pid 40896] [client 193.34.108.162:58307] File does not exist: /home/ludsocie/public_html/journal/wp-login.php
[Fri Jan 03 11:11:03.503820 2020] [:error] [pid 7094] [client 114.101.251.166:52756] File does not exist: /home/ludsocie/public_html/journal/zz.php, referer: http://\xef\xbb\xbfhttp://www.mtcn.net/
The last line, I think, predates the first upgrade, and looks like some sort of routine spammer or attacker effort (there are a few similar ones form earlier on below it). But the rest might indicate something, perhaps…