[Bug 1771294] Re: Bionic upgrade failed with bash_4.4.18-2ubuntu1_amd64.deb error

[Balint Reczey]

** Bug watch added: github.com/Microsoft/WSL/issues #1878
   https://github.com/Microsoft/WSL/issues/1878

** Also affects: unity-linux via
   https://github.com/Microsoft/WSL/issues/1878
   Importance: Unknown
       Status: Unknown

** Package changed: unity-linux => wsl

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Title:
  Bionic upgrade failed with bash_4.4.18-2ubuntu1_amd64.deb error

Status in Windows Network OS:
  Unknown
Status in update-manager-core package in Ubuntu:
  Confirmed

Bug description:
  Hi,

  In a fresh installed Linux Subsystem(Ubuntu Bionic) of Win 10, apt upgrade got this error in bash pre-installation script...
  Could anybody please confirm and check the issue? Thanks!

  Preparing to unpack .../bash_4.4.18-2ubuntu1_amd64.deb ...
  bash.preinst: cannot run dpkg-query: Invalid argument....................................................................................................................................................................................]
  dpkg: error processing archive /var/cache/apt/archives/bash_4.4.18-2ubuntu1_amd64.deb (--unpack):
   new bash package pre-installation script subprocess returned error exit status 1
  update-alternatives: using /usr/share/man/man7/bash-builtins.7.gz to provide /usr/share/man/man7/builtins.7.gz (builtins.7.gz) in auto mode
  Errors were encountered while processing:
   /var/cache/apt/archives/bash_4.4.18-2ubuntu1_amd64.deb
  E: Sub-process /usr/bin/dpkg returned an error code (1)

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