# exporting namerefs and putting namerefs in temp env post bash-4.3
 
typeset -nx ref=var;
typeset -p ref
 
var=foo; str=''
printenv ref                 # var
ref+=$str    printenv ref    # var
ref+="$str"  printenv ref    # var
ref=$ref$str printenv ref    # var
 
export ref		# follows nameref and exports var
 
printenv var                 # foo
ref+=$str    printenv var    # foo
ref+="$str"  printenv var    # foo
ref=$ref$str printenv var    # foo
 
# none of these should change ref; should follow the nameref and export var
unset var; unset -n ref; typeset -n ref=var
 
echo before
typeset -p ref var
 
echo first
ref=xxx typeset -p ref var
 
echo invalid
var= ref=5 typeset -p ref var
 
echo after
typeset -p ref var
 
# ref isn't exported, so none of the printenvs should print anything
unset var ; unset -n ref
typeset -n ref=var;
typeset -p ref
 
var=foo; str=''
printenv ref
ref+=$str    printenv ref
ref+="$str"  printenv ref
ref=$ref$str printenv ref