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#!perl -w
# fix "panic: malloc" error in fieldhash_key_free()
use strict;
use constant HAS_WEAKEN => eval {
require Scalar::Util;
Scalar::Util->import('weaken');
return 1;
};
use if !HAS_WEAKEN, 'Test::More' => 'skip_all', 'missing weaken()';
use Test::More tests => 2;
BEGIN{
package Hook::Finalizer;
use Hash::FieldHash qw(:all);
use Scalar::Util qw(weaken);
fieldhash my %finalizers_of;
sub add_finalizer{
my $ref = shift;
my $code = shift;
my $finalizers_ref = $finalizers_of{$ref} ||= bless [];
unshift @_, $code, $ref;
unshift @{$finalizers_ref}, \@_; # $code, $ref, @args
weaken $_[1]; # $ref
return $ref;
}
sub DESTROY{
my($finalizers_ref) = @_;
foreach my $finalizer (@{$finalizers_ref}){
my $code = shift @{$finalizer};
$code->(@{$finalizer});
}
}
}
use Scalar::Util qw(weaken);
{
my $a = [42];
my $b = $a;
weaken $b;
Hook::Finalizer::add_finalizer $a => sub{ my @a = @_; pass 'in finalizer'; };
}
pass 'scope out';
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