Bug#838672: debian-installer: partman does not warn of missing Bios Boot Partition when using GPT with a BIOS system
When using a GPT partition table with a BIOS-based system (not EFI), a
small Bios Boot Partition is required by Grub for embedding, see
However, partman does not display a warning when this partition is
missing. Instead, installation proceeds normally, but at the very end of
the installation, grub fails to install because of the missing partition.
This is using debian-installer Stretch Alpha 7.
Note: I am not sure the debian-installer actually allows to create a GPT
partition table. This situation happened using a disk with a pre-existing
GPT partition table.