vmm_load crashes to debugger early

From: void <void_at_f-m.fm>
Date: Mon, 22 Jan 2024 11:46:21 UTC

On a very recent -current, vmm_load="YES" in /boot/loader.conf crashes
the system to debugger early on in the boot sequence. I can't even reach
single user mode

How can I prevent this one element of /boot/loader.conf from loading?

thanks in advance for any advice