[Bug 1796438] [NEW] cryptsetup-initramfs: error message is displayed at initramfs stage when cryptsetup is not included to the initrd

[vmware-gos-Yuhua]

Public bug reported:

In ubuntu 18.10, error message is displayed at initramfs stage when
cryptsetup is not included to the initrd.

vmware at ubuntu-18.10:~$ sudo update-initramfs -u
[sudo] password for vmware: 
update-initramfs: Generating /boot/initrd.img-4.18.0-8-generic
cryptsetup: WARNING: The initramfs image may not contain cryptsetup binaries 
    nor crypto modules. If that's on purpose, you may want to uninstall the 
    'cryptsetup-initramfs' package in order to disable the cryptsetup initramfs 
    integration and avoid this warning.
rmdir: failed to remove '/var/tmp/mkinitramfs_mxUIaj/var/cache/ldconfig': No such file or directory
vmware at ubuntu-1810:~$ 

There is a bug in Debian: 
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901830

** Affects: initramfs-tools (Ubuntu)
     Importance: Undecided
         Status: New

** Package changed: cloud-init (Ubuntu) => initramfs-tools (Ubuntu)

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https://bugs.launchpad.net/bugs/1796438

Title:
  cryptsetup-initramfs: error message is displayed at initramfs stage
  when cryptsetup is not included to the initrd

Status in initramfs-tools package in Ubuntu:
  New

Bug description:
  In ubuntu 18.10, error message is displayed at initramfs stage when
  cryptsetup is not included to the initrd.

  vmware at ubuntu-18.10:~$ sudo update-initramfs -u
  [sudo] password for vmware: 
  update-initramfs: Generating /boot/initrd.img-4.18.0-8-generic
  cryptsetup: WARNING: The initramfs image may not contain cryptsetup binaries 
      nor crypto modules. If that's on purpose, you may want to uninstall the 
      'cryptsetup-initramfs' package in order to disable the cryptsetup initramfs 
      integration and avoid this warning.
  rmdir: failed to remove '/var/tmp/mkinitramfs_mxUIaj/var/cache/ldconfig': No such file or directory
  vmware at ubuntu-1810:~$ 

  There is a bug in Debian: 
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901830

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