I would advocate that everyone screen capture the crash message after reboot, otherwise i'm not sure how to find history of the crashes. I also suspect the more people that report the issue the faster (if ever) apple will get RCA and fix/improvement ..etc out.
for what its worth, I've been going down that path, and it hasn't been a good example of apple care/support/experience. but keep your head up and keep pushing on them.
I made a genius bar appointment, had to be about five days out to get first available appointment that was at a location that was an apple store, since I guess they are busy with all the broken stuff sold to customers.
I checked in 10 minutes early. was told wait at a table. 25 minutes after my appointment start time I asked where I was in the queue. that seemed to get someones attention to go track down why I wasn't been helped.
eventually a tech came to meet with me. he was rude, imo, and talking to others while I was trying to answer his questions. He did not give me the impression that he was at all listening to the details of what I was telling him, just going through some motions. but maybe that not considered rude anymore.
he ran the fast hardware check (reboot holding the d key) with their tools ..etc didn't find anything he felt was meaningful. told me that we would wipe my machine and if it happens again call phone support. Also to call phone support to report the issue and any other issues I might be having. Once the reinstall of 10.15 start he left and told me someone else would be checking me out since he was leaving and there wasn't anything else he could do, but to call in or come back if the issue continues. He then went to go chat with the young women in the store who were looking at various items. He was still there when it finished.
I did call phone support, they are looking into it for me, however I'm not hopeful there. I can hardly hear the tech who calls me, his voice always sounding very faint and choppy. but at least he is calling me daily with 'I haven't heard back from engineering' updates thus far. I keep asking him when he expects to hear back and he keeps saying within another 24-48 hours, although it's been longer than that.
after going home and manually resetting up my computer (rather than migration assistant from an old one, or restoring of a timemachine backup since when i tried that it would just reboot in the middle of it without warning or error message) it still crashes with the same message. the same crash is not logged in console. which I tried to report to phone support, but i'm not sure they understand what i'm trying to explain. (e.g. that ALL crashes of the OS should get logged to the "console" app)
I went back to the apple store after I figured that phone support was a non-starter the next day. The young lady I suspect is the genuis bar manager recongsed me and was able to find me a tech although I didn't have an appointment since I think she was trying to make up for the last time. The new tech was far more helpful. She listened to my issue, made sure she understood the steps that had already been taken to dianose or fix it, ran a few more checks and then accepted my laptop to ship out for more in depth hardware analysis and repairs. She , IMO, is the only person in the whole process of 5 techs who appeared to me to take real ownership of the issue with me. She told me me what she thought were reasonable options and asked me which one I wanted to pursue. e.g. Rather than telling me that the next step was to wait for a call back, or to go back to phone support ..etc ..etc.
So despite my poor expedience I would recommend everyone who has this problem go in, reboot and hold down the d key till it reboots and runs the dianostics, assuming that clean, make a genuis bar appointment, and ask for the 90 minute hardware test see if anything comes up from that. have lots of screen shots of the crash message ..etc ..etc ..etc
best of luck everyone - will report back if they do or don't find anything with my machine.
(p.s. it may be note worthy to know that my 2014 MBP doesn't have this issue.)
