[Bug 1297898] [NEW] Unbound variables can't be checked with -z anymore

[Sworddragon]

Public bug reported:

I'm using Ubuntu 14.04 dev with bash 4.3-4ubuntu1 and if bash is started
with the -u parameter any check of unbound variables will raise an
unbound exception. Here is a testcase:

#!/bin/bash -u

if [ -z $SOME_UNINITIALIZED_VARIABLE ]
then
	echo Variable uninitialized
fi


Executing this script will result in this output: "./test.sh: line 3: SOME_UNINITIALIZED_VARIABLE: unbound variable"

** Affects: bash (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1297898

Title:
  Unbound variables can't be checked with -z anymore

Status in “bash” package in Ubuntu:
  New

Bug description:
  I'm using Ubuntu 14.04 dev with bash 4.3-4ubuntu1 and if bash is
  started with the -u parameter any check of unbound variables will
  raise an unbound exception. Here is a testcase:

  #!/bin/bash -u

  if [ -z $SOME_UNINITIALIZED_VARIABLE ]
  then
  	echo Variable uninitialized
  fi

  
  Executing this script will result in this output: "./test.sh: line 3: SOME_UNINITIALIZED_VARIABLE: unbound variable"

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