[MacPorts] #60966: mpv @0.32.0: fails to play: Assertion failed: (group_index >= 0)

[MacPorts]

#60966: mpv @0.32.0: fails to play: Assertion failed: (group_index >= 0)
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  Reporter:  mrkapqa  |      Owner:  Ionic
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  mpv      |
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Comment (by i0ntempest):

 You need to do "sudo port -k install mpv +debug" and run lldb again, so
 the stack trace points to specific lines in the source.

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Ticket URL: <https://trac.macports.org/ticket/60966#comment:9>
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