为什么调用程序时自动激活不起作用?在这种情况下也有办法禁止它吗?
#!/usr/bin/env perl
no autovivification;
use Data::Dumper;
sub testsub { }
my $task;
print Dumper($task); # $VAR1 = undef;
my $a = $task->{parent_id};
print Dumper($task); # $VAR1 = undef;
my $b = testsub($task->{parent_id});
print Dumper($task); # $VAR1 = {};