[MacPorts] #55617: selfupdate 2.4.2: file can't be deleted

[MacPorts]

#55617: selfupdate 2.4.2: file can't be deleted
-------------------------+-------------------
 Reporter:  AndrewSwann  |      Owner:
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  base         |    Version:  2.4.2
 Keywords:  highsierra   |       Port:
-------------------------+-------------------
 On macOS High Sierra, version 10.13.2, running
 {{{
 sudo port selfupdate
 }}}
 results in the error report
 {{{
 --->  Updating MacPorts base sources using rsync
 Error: error deleting
 "/opt/local/var/macports/sources/rsync.macports.org/macports/release/tarballs/base/vendor/tcllib-1.18/modules/valtype/valtype_gs1_ean13.pcx":
 permission denied
 Please run `port -v selfupdate' for details.
 Error: /opt/local/bin/port: port selfupdate failed: error deleting
 "/opt/local/var/macports/sources/rsync.macports.org/macports/release/tarballs/base/vendor/tcllib-1.18/modules/valtype/valtype_gs1_ean13.pcx":
 permission denied
 }}}

 Running with the `-v` option does not provide more significant
 information.

--
Ticket URL: <https://trac.macports.org/ticket/55617>
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