[MacPorts] #71126: MacOSX10.13.sdk fails to install on 10.15 Catalina

[MacPorts]

#71126: MacOSX10.13.sdk fails to install on 10.15 Catalina
----------------------+-----------------------------
 Reporter:  rmottola  |      Owner:  (none)
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:  catalina  |       Port:  MacOSX10.13.sdk
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 First as proposed, I got the sdk file.
 That is a little more complicated, I logged in into downloads, but got a
 permission error when getting the file from the URL port gives.

 If I "copy address" I get
 https://download.developer.apple.com/Developer_Tools/Command_Line_Tools_macOS_10.13_for_Xcode_9.3/Command_Line_Tools_macOS_10.13_for_Xcode_9.3.dmg

 Compared to:
 https://download.developer.apple.com/Developer_Tools/Command_Line_Tools_macOS_10.13_for_Xcode_9.3/Command_Line_Tools_macOS_10.13_for_Xcode_9.3.dmg

 Which looks correct? Perhaps apple checks the path from which the URL is
 called.

 Anyway, install fails with:

 _opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_MacOSX.sdk/MacOSX10.13.sdk/work/Command_Line_Tools_macOS_10.13_for_Xcode_9.3:
 /opt/local/bin/xar -xOf /tmp/mports.YCMViY/Command\ Line\ Tools\ \(macOS\
 High\ Sierra\ version\ 10.13\).pkg CLTools_SDK_macOS1013.pkg/Payload |
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_MacOSX.sdk/MacOSX10.13.sdk/work/pbzx
 | /opt/local/bin/bsdcpio -idmu --quiet
 Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
 :debug:extract system: /usr/bin/hdiutil detach /tmp/mports.YCMViY
 :info:extract "disk2" ejected.
 :error:extract we don't appear to have extracted everything properly
 :error:extract Failed to extract MacOSX10.13.sdk: extract problem
 :debug:extract Error code: NONE
 :debug:extract Backtrace: extract problem
 :debug:extract     while executing
 :debug:extract "$procedure $targetname"
 :error:extract See /opt/local/var/macports/logs/

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Ticket URL: <https://trac.macports.org/ticket/71126>
MacPorts <https://www.macports.org/>
Ports system for macOS