[MacPorts] #49549: Port nodejs fails to upgrade from v0.12.7 to v4.2.1

[MacPorts]

#49549: Port nodejs fails to upgrade from v0.12.7 to v4.2.1
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  Reporter:  m74z00219@…  |      Owner:  ciserlohn@…
      Type:  defect       |     Status:  closed
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.3.4
Resolution:  fixed        |   Keywords:
      Port:  nodejs       |
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Comment (by m74z00219@…):

 Thank you! Your prescription resolved my issue; I was able to upgrade
 nodejs to the latest version. Much appreciated!

 One last thing, if you don't mind. I tried searching online for the
 distinction between {{{port selfupdate}}} and {{{port sync}}}, but could
 not find any. Actually, I was previously unaware of the sync command.
 Would you mind providing a short explanation of the differences between
 the commands?

 Thanks again for your assistance.

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Ticket URL: <https://trac.macports.org/ticket/49549#comment:8>
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