[MacPorts] #65257: rust: large volume of compilation warnings, pollutes build log

[MacPorts]

#65257: rust: large volume of compilation warnings, pollutes build log
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  Reporter:  mascguy  |      Owner:  MarcusCalhoun-Lopez
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.7.2
Resolution:           |   Keywords:
      Port:  rust     |
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Comment (by cjones051073):

 I agree, if the warnings are introduced as a result of patches we created
 and apply ourselves, then an attempt should be made to supress the
 warnings as much as possible.

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Ticket URL: <https://trac.macports.org/ticket/65257#comment:2>
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