Hi, I thought I'd share some difficulties I've had upgrading from 11 to 12. * Java 1.8 seems unstable - I've been doing a bit of Scala dev today, and the JVM seems somewhat unstable. SBT is crashing with the following fairly regularly. I'm pretty sure I've rebuilt it since the upgrade. # # A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x000000080177cf4f, pid=63539, tid=0x0000000000019159 # # JRE version: OpenJDK Runtime Environment (8.0_181-b13) (build 1.8.0_181-b13) # Java VM: OpenJDK 64-Bit Server VM (25.181-b13 mixed mode bsd-amd64 compressed oops) # Problematic frame: # V [libjvm.so+0x97cf4f] JVM_FindSignal+0x18534f * The upgrade to the UEFI bootloader was not smooth for me. I use grub2 to multiboot, and my grub script for FreeBSD was not changing the boot device - currdev I think in UEFI speak. This has worked for years, but recent changes to the uefi loader caused it to start caring about this and break into the loader instead of booting. The line I had to add was: search --fs-uuid --set=root <some hints> <some uuid> The only way I could find out how to fix this was via the -current list archives (and the Arch Linux wiki) Mark