[Swift CI] Build Failure: 0. OSS - Swift Incremental RA - Ubuntu 16.04 (main) #15415

# [FAILURE] oss-swift-incremental-RA-linux-ubuntu-16_04 [#15415]

Build URL: https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-16_04/15415/
Project: oss-swift-incremental-RA-linux-ubuntu-16_04
Date of build: Wed, 23 Dec 2020 18:06:04 -0600
Build duration: 1 hr 13 min

Identified problems:- Regression test failed: This build failed because a regression test in the test suite FAILed. Below is a list of all errors:

Changes- Commit c2cdce5849224b0cb333dc2619cb1a38ffae504e by mishal_shah:

Update the toolchain to support 5.4 branch

  • edit: jobs/release_5.4/oss-package-trigger.sh

  • edit: jobs/release_5.4/oss-swift-package-osx.sh

  • Commit f588e2a3ce39e0f57d842729bf1d320ed5ddb992 by github:

    Disable subclass_existentials.swift test because it's failing on Ubuntu 20.04, 18.04 and CentOS 8

    • edit: test/Interpreter/subclass_existentials.swift
  • Commit f2de54678bd56ea6be0e2a00562512fd06175f07 by danielzheng:

    [AutoDiff] Disable flaky test on Linux.

    • edit: test/AutoDiff/compiler_crashers_fixed/sr12886-sr112887-vjp-emitter-definite-initialization.swift

New issue found!