[MacPorts] #47840: lader @0.1.5: fatal error: 'tr1/unordered_map' file not found

[MacPorts]

#47840: lader @0.1.5: fatal error: 'tr1/unordered_map' file not found
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  Reporter:  seanj@…  |      Owner:  hum@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.3.3
Resolution:           |   Keywords:  mavericks yosemite
      Port:  lader    |
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Comment (by ryandesign@…):

 I have reported the problem to the developers:
 https://github.com/neubig/lader/issues/5

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Ticket URL: <https://trac.macports.org/ticket/47840#comment:2>
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