[tor-bugs] #20796 [Metrics/Torflow]: TorFlow's ScanHandler can divide by zero when there are no unmeasured nodes

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#20796: TorFlow's ScanHandler can divide by zero when there are no unmeasured nodes
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 Reporter:  teor             |          Owner:  aagbsn
     Type:  defect           |         Status:  needs_review
 Priority:  Medium           |      Milestone:
Component:  Metrics/Torflow  |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:                   |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:                   |        Sponsor:
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Comment (by tom):

 I'm ready to accept this patch but I don't have the ability to commit to
 pytorctl.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20796#comment:3>
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