endless loop in REGRESS_DEPENDS?

[J.C. Roberts]

devel/p5-Log-Log4perl
  REGRESS_DEPENDS=     
        devel/p5-Log-Dispatch
        devel/p5-Log-Dispatch-FileRotate
        databases/p5-DBD-CSV
        net/rrdtool,-perl
        textproc/p5-XML-DOM

devel/p5-Log-Dispatch-FileRotate
  REGRESS_DEPENDS=
        devel/p5-Log-Log4perl


Do endless loops in dependencies matter for REGRESS_DEPENDS?
What's the best way to handle it?

Thanks,
JCR