Hi Folks,

So I'm a bit stumped here. I've got a simple forking server managed through a fork() wrapper module, there is nothing special here, the wrapper module (Ext::Fork) just manages queues and execute requests etc.

So here is where I'm at, with perl 5.8.8 5.8.9 5.10 and 5.10.1 I'm reliably seeing:

panic: attempt to copy freed scalar 802e7e120 to 802e7e708 at Server.p
+m line 380.

[download]

Line 380 of Server.pm:

(%ch) = rfork_list_children(1);

[download]

rfork_list_children is exported from Ext::Fork:

sub rfork_list_children {
        my ($use_hash) = @_;

        if(!$Ext::Fork::POOL->{cidlist}){
                return;
        }

        if($use_hash){
                return %{ $Ext::Fork::POOL->{cidlist} };
        } else {
                return keys %{ $Ext::Fork::POOL->{cidlist} };
        }
}

[download]

So the interesting bit is this code is repeatedly hit thousands of times prior to the panic, and it should never be reached in the event of $Ext::Fork::POOL->{cidlist}->{} is undefined.

Does anyone seen any no-no's here that I should be avoiding explicitly that can result in the above panic?

Thanks!

In reply to panic: attempt to copy freed scalar 802e7e120 to 802e7e708 at Server.pm line 380. by faber

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