bash error in bash_completion.d/dust.bash after upgrade to v1.1.1

After upgrading to the latest version 1.1.1, I started getting the error from bash_completion/dust.bash:

-bash: /usr/local/etc/bash_completion.d/dust.bash: line 62: conditional binary operator expected
-bash: /usr/local/etc/bash_completion.d/dust.bash: line 62: syntax error near `IFS'
-bash: /usr/local/etc/bash_completion.d/dust.bash: line 62: `                    if [[ -v IFS ]]; then'

I am on Mac OS 14.5 with GNU bash, version 5.2.32(1)-release (x86_64-apple-darwin23.4.0)

I also get the same result if I use the native Mac GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin23)

In looking for a solution I found this stack exchange post https://unix.stackexchange.com/questions/264926/is-it-a-sane-approach-to-back-up-the-ifs-variable

${IFS+"false"} && unset oldifs || oldifs="$IFS"    # correctly store IFS.

IFS="error"                 ### change and use IFS as needed.

${oldifs+"false"} && unset IFS || IFS="$oldifs"    # restore IFS.

So If I use this technique to save and restore IFS in the script, I don't see the error.

Here is the new code with the old code commented out.

                --ignore-all-in-file)
                    ${IFS+"false"} && unset oldifs || oldifs="$IFS"
                    # local oldifs
                    # if [[ -v IFS ]]; then
                    #     oldifs="$IFS"
                    # fi
                    IFS=$'\n'
                    COMPREPLY=($(compgen -f "${cur}"))
                    ${oldifs+"false"} && unset IFS || IFS="$oldifs"
                    # if [[ -v oldifs ]]; then
                    #     IFS="$oldifs"
                    # fi
                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
                        compopt -o filenames
                    fi
                    return 0
                    ;;
                -I)
                    ${IFS+"false"} && unset oldifs || oldifs="$IFS"

                    # local oldifs
                    # if [[ -v IFS ]]; then
                    #     oldifs="$IFS"
                    # fi
                    IFS=$'\n'
                    COMPREPLY=($(compgen -f "${cur}"))
                    ${oldifs+"false"} && unset IFS || IFS="$oldifs"

                    # if [[ -v oldifs ]]; then
                    #     IFS="$oldifs"
                    # fi
                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
                        compopt -o filenames
                    fi
                    return 0
                    ;;

bootandy / dust

bash error in bash_completion.d/dust.bash after upgrade to v1.1.1 #426