[MacPorts] #63417: doxygen @1.9.2: error: no matching constructor for initialization of 'value_type'

[MacPorts]

#63417: doxygen @1.9.2: error: no matching constructor for initialization of
'value_type'
---------------------------+-----------------------
  Reporter:  sambthompson  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.1
Resolution:                |   Keywords:  elcapitan
      Port:  doxygen       |
---------------------------+-----------------------

Comment (by thetrial):

 Moreover, doxygen is not upgrade-excludable (here) – so I’m stuck when
 trying to update my ports.

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Ticket URL: <https://trac.macports.org/ticket/63417#comment:3>
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