I have a code similar to the below. I have one main script which is calling another module named initial.pm. initial.pm opens up connection with an AMQP server (In my case RabbitMQ)and using Net::AMQP::RabbitMQ library for establishing the connection. Everything works fine except when I try to join my threads I get segmentation fault. I think the Net::AMQP::RabbitMQ is not thread safe. But this is only being used by the main thread. Im pretty sure you can reproduce the error if you just copy and past the codes below. main.pl

#!/usr/bin/perl
use Cwd qw/realpath/;
use File::Basename qw/dirname/;
use lib 'lib';
use threads;
use threads::shared;
use initial;

my @threads = ();
my $run :shared = 1;

my $init = load initial($name);

$SIG{'TERM'} = sub {
    $run = 0;
};

threads->create(\&proc1);
threads->create(\&proc2);


while($run){
    sleep(1);
    print "I am main thread\n";
}

$_->join() for threads->list();

sub proc1 {
    while($run){
        sleep(1);
        print "I am child thread 1 \n"
    }
}

sub proc2 {
    while($run){
       sleep(1);
       print "I am child thread 2 \n";
    }
}
[download]

lib/initial.pm

package initial;

use Net::AMQP::RabbitMQ;
use Cwd qw/realpath/;
use File::Basename qw/dirname/;

my $mq;
my $stop = 0;

sub load {
    my $class = shift;
    my $self = {};
    connectq();
    bless $self,$class;
    return $self;
}

sub connectq {
    $mq = Net::AMQP::RabbitMQ->new();
    my ($host,$port,$user,$pass) = ('localhost','5672','guest','guest'
+);
    $mq->connect($host, {
        user => $user,
        password => $pass,
        port => $port,
        timeout => 10,
    });

    $mq->channel_open(1);
    $mq->consume(1, 'logger');
}

1;
[download]

If I call the initial class after creating the threads I dont see the error. It seems the threads are copying all the previously initiated variables into it when it is being created. In my case I dont need to access my $init variable from any other threads. So is there a way to tell perl not to copy a specific variable while creating new threads ?

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