check.pm6

#the sub function where error is, at line 8
our sub object_repo_exist($yaml, $object, $object_name, $group_name) is export
# $ yaml.datas contain the my.yaml parsed file. checked... exactly same structure and content of datas.
 { #give object=title|url , object_name, group_name 
  my $i = 0;
  my %group = $yaml.datas.first: { $_<group> eq $group_name };
  my %repo;
  unless (%group<repos>.elems == 0) {
    return True if %group<repos>.first: { $_<<$object>> eq $object_name };
  }
  return False;
}

our sub repo_is_correct($yaml, $group_name, $title, $url) is export(:MANDATORY) { 
# group_name has been selected and is a string contain the existing name of group (has been selected from a menu)
  if ( object_repo_exist( $yaml, "title", $title, $group_name ) ) { return "title exist"; }  # call from there...
  if ( object_repo_exist( $yaml, "url", $title, $group_name ) ) { return "url exist"; } # and also from there...
  unless ( git_repo_exist ( $url ) ) { return "remote repo failed"; }
  unless ( prompt-for( "title: $title\nurl: $url\ncorrect ? Do we save this ?", :yn(True) ) ) {
    return "want to change" ; } 
  return "all is ok";
}

my.yaml

---
- group: default
  repos: []
- group: try
  repos:
  - title: air-line
    url: https://github.com/vim-airline/vim-airline
...