Well, of course it does if you do something like this after the loop is done:

print join(" ",@trap),"\n";
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You said you wanted to extract your nodes, and that's what you get -- hash references to the nodes stored in @trap. If you print them, you'll get stringified references. You can use Data::Dumper on them, or dereference them to process their fields, but just printing them won't work.

Update: Did you just want the list of node names? Then do:

my @trap = keys %{$name->{nodes}};
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