[Bug 1793668] Re: xargs gives "[: err: unexpected operator" on Ubuntu but not Centos

[Brian Murray]

** Package changed: ubuntu => findutils (Ubuntu)

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Title:
  xargs gives "[: err: unexpected operator" on Ubuntu but not Centos

Status in findutils package in Ubuntu:
  New

Bug description:
  cd /tmp
  rm -Rf tst err
  echo 'if [ "$1" == "" ]; then echo "empty"; else cat $1; fi' > tst
  chmod +x tst
  echo "a" > err
  ls err | xargs ./tst # ./tst: 1: [: err: unexpected operator
  ./tst err # works fine, outputs 'a'

  On Ubuntu the error will be shown, on Centos it won't. The error looks
  to be incorrect.

  $ lsb_release -rd
  Description: Ubuntu 18.04.1 LTS
  Release: 18.04
  $ xargs --version
  xargs (GNU findutils) 4.7.0-git
  Copyright (C) 2017 Free Software Foundation, Inc.

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