[MacPorts] #56223: clang-6.0 unused regex?

[MacPorts]

#56223: clang-6.0 unused regex?
----------------------------+----------------------
  Reporter:  gaming-hacker  |      Owner:  kencu
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.4.2
Resolution:                 |   Keywords:
      Port:  clang-6.0      |
----------------------------+----------------------

Comment (by kencu):

 I'm not sure I fixed it yet.

 It's pretty low on the priority list, TBH. Just finished fixing up icu,
 and now working on clang-12, and making sure it works properly for 10.6 to
 BigSur is a bit of a project.

 These little reinplace warnings are on the list, but not the top of the
 list.

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Ticket URL: <https://trac.macports.org/ticket/56223#comment:7>
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