[MacPorts] #37376: Moving to tcltk 8.6 breaks other ports

[MacPorts]

#37376: Moving to tcltk 8.6 breaks other ports
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  Reporter:  ralph@…                    |      Owner:  macports-tickets@…
      Type:  defect                     |     Status:  new
  Priority:  Normal                     |  Milestone:
 Component:  ports                      |    Version:  2.1.2
Resolution:                             |   Keywords:
      Port:  wordnet grass vtk5 tcl tk  |
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Comment (by g5pw@…):

 I can't seem to find an error for grass, although the build errors out.
 Can someone provide a failed build log?

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Ticket URL: <https://trac.macports.org/ticket/37376#comment:8>
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