Kernel 5.8-rc2 has been released, and brief details are here: http://lkml.iu.edu/hypermail/linux/kernel/2006.2/08747.html
There is no change to the problem with VMware runtime, and vmware-modconfig still segfaults, and the system still reboots immediately, when a VM open is attempted.
To check that this was not due to a kernel misconfiguration, I installed the Fedora (Rawhide) version of Kernel 5.8-rc1 – 5.8.0-0.rc1.20200617git69119673bd50.1.fc33.x86_64. This produced the same failure as with my compiled version from kernel.org.
Robert Gadsdon. June 21st 2020.