[Swift CI] Build Failure: 0. OSS - Swift Incremental RA - Ubuntu 16.04 (main) #15634

# [FAILURE] oss-swift-incremental-RA-linux-ubuntu-16_04 [#15634]

Build URL: https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-16_04/15634/
Project: oss-swift-incremental-RA-linux-ubuntu-16_04
Date of build: Thu, 28 Jan 2021 19:27:17 -0600
Build duration: 53 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 a7e8034396b4af19b0d58afc150a6ef3b83a4f81 by pyaskevich:

[ConstraintSystem] NFC: Print type variables embedded in common result type

  • edit: lib/Sema/CSSimplify.cpp

  • Commit bf4dd4c8af727c2b3b5cdcfa2507f0d2c2f7202c by github:

    api cleanup in preperation for identity improvments (#3214)

    • add: Bar-1.2.3.zip
    • edit: Sources/PackageCollections/Providers/GitHubPackageMetadataProvider.swift
    • edit: Tests/PackageCollectionsTests/GitHubPackageMetadataProviderTests.swift
    • edit: Sources/PackageGraph/RepositoryPackageContainer.swift
    • edit: Sources/Commands/SwiftPackageCollectionsTool.swift
    • edit: Sources/SPMTestSupport/MockWorkspace.swift
    • edit: Tests/WorkspaceTests/WorkspaceTests.swift
    • edit: Sources/PackageGraph/PinsStore.swift
    • edit: Tests/WorkspaceTests/PinsStoreTests.swift
    • edit: Sources/PackageGraph/PackageModel+Extensions.swift
    • edit: Tests/PackageGraphTests/RepositoryPackageContainerProviderTests.swift
    • edit: Sources/Workspace/ManagedArtifact.swift
    • edit: Sources/PackageModel/PackageIdentity.swift
    • edit: Sources/PackageGraph/Pubgrub/PubgrubDependencyResolver.swift
    • edit: Sources/PackageGraph/LocalPackageContainer.swift
    • edit: Tests/PackageGraphTests/PubgrubTests.swift
    • edit: Sources/PackageCollections/Utility.swift
    • edit: Sources/PackageGraph/PackageContainer.swift
    • edit: Sources/PackageModel/Manifest/PackageDependencyDescription.swift
    • edit: Sources/Commands/SwiftTool.swift
    • edit: Sources/PackageGraph/PackageGraphRoot.swift
    • edit: Sources/SPMTestSupport/MockPackageContainer.swift
    • edit: Sources/PackageGraph/DependencyResolutionNode.swift
    • edit: Sources/Workspace/ResolverPrecomputationProvider.swift
    • edit: Sources/PackageGraph/PackageGraph+Loading.swift
    • edit: Sources/PackageModel/PackageReference.swift
    • edit: Sources/Workspace/ManagedDependency.swift
    • edit: Sources/Workspace/Workspace.swift
    • edit: Sources/SPMTestSupport/MockDependencyGraph.swift