[MacPorts] #61751: Building protobuf3-cpp :info:build ./google/protobuf/map_field.h:332:37: error: constexpr constructor never produces a constant expression [-Winvalid-constexpr]

[MacPorts]

#61751: Building protobuf3-cpp :info:build ./google/protobuf/map_field.h:332:37:
error: constexpr constructor never produces a constant expression
[-Winvalid-constexpr]
------------------------+-----------------------
  Reporter:  dbl001     |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.6.4
Resolution:             |   Keywords:  protobuf3
      Port:  protobuf3  |
------------------------+-----------------------
Changes (by dbl001):

 * Attachment "main.log" added.


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Ticket URL: <https://trac.macports.org/ticket/61751>
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