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096a00f404
One can call divert_grub; replace_kernel; undivert_grub. And replace_kernel will call into force_boot_without_initramfs, which under certain conditions can call divert_grub & undivert_grub. Resulting in undivert_grub called twice in a row. When undivert_grub is called twice in a row it wipes systemd-detect-virt binary from disk, as the rm call is unguarded to check that there is something to divert if systemd package is installed. And if the systemd package is not installed, it does not check that systemd-detect-virt file is in-fact what divert_grub has created. Add a guard to check that systemd-detect-virt is the placeholder one, before removing it. LP: #1902260