It seems the DESTROY method doesn't quite work as advertised in this case (i.e. it doesn't destroy all circular references). If you use Data::Dumper; and write 

        print Dumper $tree;
        $tree->DESTROY(); #clear circular references
        print Dumper $tree; <STDIN>;

[download]

you can compare the dump before and after the DESTROY call. You'll notice that the _parent attribute of the first-level child nodes has been set to undef, but not those of the children further down in the tree...

Anyway, as the module also allows for weak references to be used, you could also simply write 

use Tree::Simple 'use_weak_refs';

[download]

...and be happy :) — Just tried it, no memory leaks any longer.

In reply to Re: Simple Program Huge Problem by almut
in thread Simple Program Huge Problem by crusher

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