Problem identified. The variable intrd_device contains a \r at the end
of the variable. When concatenating the variable with the subsequent
variables, it effectively truncates the subsequent data in the echo
return.
Preceding the if statement, I inserted the following:
# remove the trailing \r from the variable
initrd_device=$(echo ${initrd_device} | tr -d '\r')
This removed the trailing \r, allowing the full set of data to be
returned.
I tested this fix on my own system by modifying the 10_linux_zfs script
in /etc/grub.d. The grub.cfg is now successfully generated and apt/dpkg
are able to perform an update-grub.
10_linux_zfs attached.
** Attachment added: "10_linux_zfs"
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1848856/+attachment/5299058/+files/10_linux_zfs
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https://bugs.launchpad.net/bugs/1848856
Title:
Upgrade from 19.04 to 19.10 with zfs on root fails with grub syntax
error
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