[MacPorts] #61313: Error: fitsviewer: Variant gcc10 conflicts with gcc8

[MacPorts]

#61313: Error: fitsviewer: Variant gcc10 conflicts with gcc8
-----------------------------------------------+------------------------
 Reporter:  gallc1                             |      Owner:  (none)
     Type:  defect                             |     Status:  new
 Priority:  High                               |  Milestone:
Component:  ports                              |    Version:  2.6.3
 Keywords:  Variant gcc10 conflicts with gcc8  |       Port:  fitsviewer
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 when doing sudo port upgrade outdated I got the following error
 {{{
 sudo port upgrade outdated
 Error: fitsviewer: Variant gcc10 conflicts with gcc8
 Error: Unable to open port: Error evaluating variants
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 }}}

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Ticket URL: <https://trac.macports.org/ticket/61313>
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