Bug#858528: grub-coreboot: fails to upgrade from jessie to stretch if init-select was installed

[Andreas Beckmann]

Package: grub-coreboot
Version: 2.02~beta3-5
Severity: serious
User: debian-qa at lists.debian.org
Usertags: piuparts
Control: affects -1 + init-select

Hi,

during a test with piuparts I noticed your package fails to upgrade from
'jessie'.
It installed fine in 'jessie', then the upgrade to 'stretch' fails
because it tries to overwrite other packages files without declaring a
Breaks+Replaces relation.

See policy 7.6 at
https://www.debian.org/doc/debian-policy/ch-relationships.html#s-replaces

>From the attached log (scroll to the bottom...):

  Setting up grub-coreboot (2.02~beta3-5) ...
  Installing new version of config file /etc/kernel/postinst.d/zz-update-grub ...
  Installing new version of config file /etc/kernel/postrm.d/zz-update-grub ...
  /var/lib/dpkg/info/grub-coreboot.config: 1: /etc/default/grub.d/init-select.cfg: /usr/lib/init-select/get-init: not found
  dpkg: error processing package grub-coreboot (--configure):
   subprocess installed post-installation script returned error exit status 127

This was observed in the following configuration:

* --arch i386
* --install-recommends
* package to be tested: init-select/jessie
* distupgrade from jessie to stretch (stretch does not have init-select,
  init-select was removed before grub-coreboot was configured)


cheers,

Andreas
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