[Swift CI] Build Failure: OSS - Swift Package - Ubuntu 16.04 (main) #5935

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# [FAILURE] oss-swift-package-linux-ubuntu-16_04 [#5935]

Build URL: https://ci.swift.org/job/oss-swift-package-linux-ubuntu-16_04/5935/
Project: oss-swift-package-linux-ubuntu-16_04
Date of build: Tue, 16 Feb 2021 09:07:58 -0600
Build duration: 1 hr 37 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 fd1063625368f0bdb139bbcb76a86ac5d85fb051 by konrad_malawski:

[Concurrency][Task Locals] Fix missing flag setting on next pointer

  • edit: include/swift/ABI/Task.h

  • Commit 3c02dba2c482ea9d595614022d11e600e3dee67b by rxwei:

    [AutoDiff] Change derivative vtable thunk linkage to private.

    • edit: lib/SILGen/SILGenThunk.cpp
    • edit: lib/SIL/IR/SILDeclRef.cpp
    • edit: test/AutoDiff/TBD/derivative_symbols.swift
    • edit: lib/SILGen/SILGen.h
    • edit: test/AutoDiff/SILGen/vtable.swift

  • Commit 44708dc739fe19aaeafc4360bed5682c12b032d0 by github:

    Skip libdispatch build for freestanding presets (#35976)

    • edit: utils/build-presets.ini