[MacPorts] #71158: MacPorts 2.10.2 does not let me extract a port while another port is being built

[MacPorts]

#71158: MacPorts 2.10.2 does not let me extract a port while another port is being
built
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  Reporter:  ballapete  |      Owner:  (none)
      Type:  defect     |     Status:  closed
  Priority:  Normal     |  Milestone:
 Component:  base       |    Version:  2.10.2
Resolution:  duplicate  |   Keywords:
      Port:             |
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Comment (by ballapete):

 No. I am only **extracting**, no intention to patch, build, test, upgrade,
 or install.

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Ticket URL: <https://trac.macports.org/ticket/71158#comment:2>
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