[MacPorts] #59004: source-highlight fails to upgrade

[MacPorts]

#59004: source-highlight fails to upgrade
-------------------------------+--------------------
  Reporter:  dershow           |      Owner:  (none)
      Type:  defect            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:
Resolution:                    |   Keywords:
      Port:  source-highlight  |
-------------------------------+--------------------

Comment (by dershow):

 I did confirm that I have boost installed:

 {{{
 $ port installed boost
 The following ports are currently installed:
   boost @1.71.0_0+no_single+no_static+python27 (active)
 }}}

 And, it was working fine for the prior version, 3.1.8_4

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Ticket URL: <https://trac.macports.org/ticket/59004#comment:1>
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