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# checks for array variables and positional parameter expansions losing quoted
# null string expansions -- problem through bash-5.1
set -- ''
myvar[0]=
a="${myvar[*]}"
recho "$*"
recho "${*}"
recho "${a}"
recho "${myvar[*]}"
recho "${a:+nonnull}"
recho "${myvar[*]:+nonnull}"
a="${myvar[@]}"
recho "$@"
recho "${@}"
recho "${a}"
recho "${myvar[@]}"
recho "${a:+nonnull}"
recho "${myvar[@]:+nonnull}"
# check to make sure literal CTLNULs are handled correctly
set -- $'\x7f'
recho "$@"
recho "${@}"
recho "${@:+nonnull}"
recho "$*"
recho "${*}"
recho "${*:+nonnull}"
shift $#
# these should echo nothing
recho "${@}"
recho "${@:+nonnull}"
unset -v a
# make sure that other null expansions result in null strings where appropriate
set -- ''
a[0]=
recho "$*"$x
recho "${*}"$x
recho "$@"$x
recho "${@}"$x
recho "${a[*]}"$x
recho "${a[@]}"$x
recho "$@"$x
recho "${@}"$x
recho "${a[*]}"
recho "${a[@]}"
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