This is a regression
Marking triaged, easily reproducible:
*BEFORE* dist-upgrade:
1. edit /etc/default/grub
2. change GRUB_COMLINE_LINUX_DEFAULT from:
GRUBCMDLINE_LINUX_DEFAULT="quiet splash"
to:
GRUB_CMDLINE_LINUX_DEFAULT="quiet \"
splash"
3. run a dist-upgrade
Expected result: update-grub/install completes successfully
Actual result: update-grub fails (or apt fails), because
/etc/default/grub now has a mangled GRUB_CMDLINE_LINUX_DEFAULT:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
splash"
I am setting importance to medium because it will only impact users with
continuation lines.
** Tags added: bionic regression-update
** Changed in: grub2 (Ubuntu)
Importance: Undecided => Medium
** Changed in: grub2 (Ubuntu)
Status: New => Triaged
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https://bugs.launchpad.net/bugs/1868138
Title:
18.04LTS upgrade of grub-common:amd64 FAILs in post-install;
incorrectly REWRITES user's /etc/default/grub
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