Turn off autovivification for rvalue dereferencing expressions, such
as "$value = $hashref->{key}[$idx]{$field}", "keys
%{$hashref->{key}}" or "values %{$hashref->{key}}". Starting from
Turn off autovivification for rvalue dereferencing expressions, such
as "$value = $hashref->{key}[$idx]{$field}", "keys
%{$hashref->{key}}" or "values %{$hashref->{key}}". Starting from