alpha8 build from src hw.model: Intel(R) Core(TM) i7-7560U CPU @ 2.40GHz (dell xps13 laptop) uname: FreeBSD akai.skunkwerks.at 12.0-ALPHA8 FreeBSD 12.0-ALPHA8 r339225+c0b412ce93b9(master) GENERIC amd64 Dump header from device: /dev/gpt/swap Architecture: amd64 Architecture Version: 4 Dump Length: 90112 Blocksize: 512 Compression: none Dumptime: Thu Oct 11 09:28:47 2018 Hostname: akai.skunkwerks.at Magic: FreeBSD Text Dump Version String: FreeBSD 12.0-ALPHA8 r339225+c0b412ce93b9(master) GENERIC Panic String: solaris assert: HDR_EMPTY(hdr), file: /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c, line: 6213 Dump Parity: 4060580370 Bounds: 0 Dump Status: good this occurred a few seconds after resume-from-suspend with i915kms: drm-devel-kmod-4.16.g20180927 DRM modules for the linuxkpi-based KMS components (development version) gpu-firmware-kmod-g20180825 Firmware modules for the linuxkpi-based KMS components unfortunately ddb wasn't correctly set up so I've lost the rest of the info. I will update if I can get a repeat.