[Swift CI] Build Failure: 0. OSS - Swift Incremental RA - Ubuntu 16.04 (release/5.3) #454

# [FAILURE] oss-swift-5.3-incremental-RA-linux-ubuntu-16_04 [#454]

Build URL: https://ci.swift.org/job/oss-swift-5.3-incremental-RA-linux-ubuntu-16_04/454/
Project: oss-swift-5.3-incremental-RA-linux-ubuntu-16_04
Date of build: Mon, 27 Jul 2020 19:36:45 -0500
Build duration: 34 min

Identified problems:- Compile Error: This build failed because of a compile error. Below is a list of all errors in the build log:

Changes- Commit 900bba3dbbd9602959fd2fb96f19c47442483bb7 by anders:

[5.3] Mark the temporary v10_16 alias for macOS v11 as unavailable

  • edit: Tests/PackageLoadingTests/PD5LoadingTests.swift

  • edit: Sources/PackageDescription/SupportedPlatforms.swift

  • Commit 98f7ebec68490e0c50e2cd91977c9c99969bea42 by github:

    Mark --build-system as experimental (#2829)

    • edit: Sources/Commands/SwiftTool.swift
  • Commit 3ef7b8f5018813c456812173b3ae11c73bb9af00 by github:

    Demote unhandled file diagnostic to a warning (#2830)

    • edit: Sources/PackageLoading/TargetSourcesBuilder.swift

Looks like [SR-12902] swiftpm tests fail in MiscellaneousTestCase.testPackageManagerDefineAndXArgs on linux · Issue #4543 · apple/swift-package-manager · GitHub. Not sure if this is real or “just” flaky. I see that the test has been disabled in main branch, but apparently not the 5.3 branch.