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Answer: having difficulty getting $self back from an _init() function
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Q&A > object-oriented programming > having difficulty getting $self back from an _init() function contributed by Fastolfe

In your init function, you are changing $self, creating a new hash reference. This destroys the associations it's had before. If you want to add some items to $self, set them individually: 
sub _init {
   ...
   $self->{modules} = { %registry };
   $self->{site}    = $regattrs{site};
   ...
}

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