fix(cpan2dist): fix leaked variable dir

Author: akinomyoga

completions/cpan2dist

@@ -23,7 +23,7 @@ _cpan2dist()
         COMPREPLY=($(compgen -W '$(_parse_help "$1")' -- "$cur"))
     else
         local cpandirs=("$HOME/.cpanplus/" "$HOME/.cpan/source/modules/")
-        local packagelist
+        local dir packagelist
         unset -v packagelist # workaround for localvar_inherit
         for dir in "${cpandirs[@]}"; do
             [[ -d $dir && -r "$dir/02packages.details.txt.gz" ]] &&