[MacPorts] #61785: mame: 0.226 build fails for 10.7_x64 and 10.10_x64, due to potential python 3.8 process termination

[MacPorts]

#61785: mame: 0.226 build fails for 10.7_x64 and 10.10_x64, due to potential python
3.8 process termination
----------------------------+---------------------
  Reporter:  mascguy        |      Owner:  admin@…
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  buildbot/mpbb  |    Version:
Resolution:                 |   Keywords:
      Port:  mame           |
----------------------------+---------------------

Comment (by neverpanic):

 macOS kills processes that violate the sandbox. We're running builds
 inside a sandbox as configured in https://github.com/macports/macports-
 base/blob/master/src/port1.0/portsandbox.tcl. Violating this sandbox
 during a build may lead to this.

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Ticket URL: <https://trac.macports.org/ticket/61785#comment:1>
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