[MacPorts] #59901: Cannot install pallet in Catalina

[MacPorts]

#59901: Cannot install pallet in Catalina
---------------------+--------------------
 Reporter:  jiajuwu  |      Owner:  (none)
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.6.2
 Keywords:           |       Port:
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 apple@ homebrew$ port -v
 MacPorts 2.6.2
 Entering shell mode... ("help" for help, "quit" to quit)
 [Taps/homebrew] > quit
 Goodbye
 apple@ homebrew$ sudo port install pallet
 Password:
 Error: Port Pallet requires a full Xcode installation, which was not found
 on your system.
 Error: You can install Xcode from the Mac App Store or
 https://developer.apple.com/xcode/
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 Error: Processing of port pallet failed
 apple@ homebrew$

 macOS Catalina
 10.15.2 (19C57)

 Xcode 11.3

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Ticket URL: <https://trac.macports.org/ticket/59901>
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