This is a version of the problem that I described in Re: Eval doesn't see lexicals. (End of file is a block exit and Perl does cleanup.) The simplest solution is to insert the following in EvilEval.pm. 
# Fool Perl's reference counting into keeping %serial_of alive
sub do_not_cleanup_serial_of {
  %serial_of;
}

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In reply to Re^4: Eval doesn't see lexicals by tilly
in thread Eval doesn't see lexicals by Anonymous Monk

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