Description:

unable to grub-install (2.04) on btrfs partitionless disk

# grub-install /dev/sda
Installing for i386-pc platform.
grub-install: warning: your core.img is unusually large. It won't fit in the embedding area.
grub-install: error: filesystem `btrfs' doesn't support blocklists.

The system could be potentially unbootable !

no issue with previous grub 2.02.

If i create a /dev/sda1 partition, no problem.

Additional info:
* package version(s) : grub 2.04
* config and/or log files etc.
* link to upstream bug report, if any

Steps to reproduce:

just grub-install on a partitionless btrfs disk