[MacPorts] #67046: Either python or py-prompt_toolkit is broken on Leopard: KeyError: '0 is not registered' when trying to run dependents

[MacPorts]

#67046: Either python or py-prompt_toolkit is broken on Leopard: KeyError: '0 is
not registered' when trying to run dependents
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  Reporter:  barracuda156  |      Owner:  xeron
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:
      Port:                |
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Comment (by barracuda156):

 Replying to [comment:1 xeron]:
 > I don't have access to neither 10.5 nor 10.6. Using 11.7.4 I can't
 reproduce the issue.

 Already on 10.6.8 the error does not occur. It is specific either to PPC
 or to pre-10.6-release macOS (that is, standard case is 10.5.8).

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Ticket URL: <https://trac.macports.org/ticket/67046#comment:2>
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