[MacPorts] #65183: rust: Portfile can fail to parse depending on build_arch

[MacPorts]

#65183: rust: Portfile can fail to parse depending on build_arch
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  Reporter:  jmroot  |      Owner:  MarcusCalhoun-Lopez
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  rust    |
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Comment (by MarcusCalhoun-Lopez):

 There is a [https://github.com/macports/macports-ports/pull/14853 pull
 request] that might solve the problem.\\
 Unfortunately, I do not know how to properly test it.

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Ticket URL: <https://trac.macports.org/ticket/65183#comment:4>
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