[MacPorts] #62813: clang-11 @11.1.0_2 Registry error: legacy-support not registered as installed & active.

[MacPorts]

#62813: clang-11 @11.1.0_2 Registry error: legacy-support not registered as
installed & active.
-------------------------+--------------------
  Reporter:  cave-canem  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  clang-11    |
-------------------------+--------------------

Comment (by ryandesign):

 Yes, trace mode routinely does not like it when you substitute one port
 for another (e.g. a -devel port for a non-devel port). As a workaround,
 don't use trace mode.

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Ticket URL: <https://trac.macports.org/ticket/62813#comment:3>
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