Re: Empty strings disappear from array splice

[Greg Wooledge]

On Mon, Jan 19, 2015 at 03:22:36PM -0800, marc.coiffier@gmail.com wrote:
> Here is the minimal code sample to reproduce the bug (present in version 4.2, 
> corrected in 4.3 as far as I can tell) :
> 
>   arr1=( "" "" )
>   arr2=( "${arr1[@]:1}" )

Seems to be either a Debian-specific bug, or a bug that was fixed in a
later patch than Debian is using.

On Debian:

wooledg@wooledg:~$ echo "$BASH_VERSION"
4.2.37(1)-release
wooledg@wooledg:~$ arr1=( "" "" )
wooledg@wooledg:~$ arr2=( "${arr1[@]:1}" )
wooledg@wooledg:~$ declare -p arr1 arr2
declare -a arr1='([0]="" [1]="")'
declare -a arr2='()'

On HP-UX with bash compiled straight from source:

imadev:~$ bash-4.2
imadev:~$ echo "$BASH_VERSION"
4.2.46(1)-release
imadev:~$ arr1=( "" "" )
imadev:~$ arr2=( "${arr1[@]:1}" )
imadev:~$ declare -p arr1 arr2  
declare -a arr1='([0]="" [1]="")'
declare -a arr2='([0]="")'