[MacPorts] #62710: `return -code error` doesn't work inside a catch clause

[MacPorts]

#62710: `return -code error` doesn't work inside a catch clause
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 Reporter:  jmroot  |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  base    |    Version:
 Keywords:          |       Port:
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 See attached demo code. This was the underlying cause of #56549.

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Ticket URL: <https://trac.macports.org/ticket/62710>
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