[MacPorts] #63834: legacy-support: can't read "ls_cache_incpath": no such variable

[MacPorts]

#63834: legacy-support: can't read "ls_cache_incpath": no such variable
-----------------------------+--------------------------
  Reporter:  ryandesign      |      Owner:  cjones051073
      Type:  defect          |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.7.1
Resolution:                  |   Keywords:
      Port:  legacy-support  |
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Comment (by ryandesign):

 Yes, there we go. I can reproduce it on High Sierra with:
 {{{
 port info mercurial +rust legacysupport.newest_darwin_requires_legacy=99
 }}}
 (The machine doing the mirroring still runs El Capitan.)

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Ticket URL: <https://trac.macports.org/ticket/63834#comment:5>
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