[MacPorts] #73268: mas @ 3.1.0 ARM64: Build failure on macOS 15.7.2 with Xcode 26.1

[MacPorts]

#73268: mas @ 3.1.0 ARM64: Build failure on macOS 15.7.2 with Xcode 26.1
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  Reporter:  dancamper  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  mas        |
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Comment (by rgoldberg):

 @ShadSterling I don't know why your Xcode 26.3 build failed with Span
 errors. If it was on the then latest (or close thereto) macOS 15, my test
 builds on Xcode 26.3 on macos-15 & macos-15-intel GHA runners built fine,
 as did the Homebrew Core bottles for macOS 15.

 Your SDK was 15 for your much older failed build. I don't know if the 26
 SDK can be used at all on macOS 15, or if using the 15 SDK caused your
 problem.

 You could see if a macOS 26 SDK exists in
 /Library/Developer/CommandLineTools/SDKs/:

 ls -l /Library/Developer/CommandLineTools/SDKs/

 If one is there, try using that instead of the macOS 15 one,

 If that doesn't work, you might want to try to build mas directly from a
 GitHub clone.

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Ticket URL: <https://trac.macports.org/ticket/73268#comment:10>
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