+
+ # I'd like to use *{ $self->[0] } = $self->[1]->(); here,
+ # but that causes all sorts of problems. The hash is accessible from
+ # within this sub, but not where its creation was triggered.
+ # Immediately after the triggering statement, the hash becomes available
+ # to all: even the scope where the previous access attempt failed.
+
+ %{ $self->[0] } = %{ $self->[1]->() }