[Swift CI] Build Failure: 0. OSS - Swift Incremental RA - Ubuntu 16.04 (master) #13667

# [FAILURE] oss-swift-incremental-RA-linux-ubuntu-16_04 [#13667]

Build URL: https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-16_04/13667/
Project: oss-swift-incremental-RA-linux-ubuntu-16_04
Date of build: Tue, 09 Jun 2020 13:55:40 -0500
Build duration: 27 min

Changes- Commit 017d99d7e400bb764095941e05fe298fff4155cb by compnerd:

test: add a test to prevent weak symbol leakage

  • add: test/stdlib/symbol-visibility-linux.test-sh

  • add: test/stdlib/symbol-visibility-darwin.test-sh

  • Commit 668f3e6381c94aec2a01fc7a4bdefcc6f4369444 by erik.pilkington:

    [ObjC] Fix AST serialization for pseudo-strong parameters

    • add: clang/test/PCH/externally-retained.m
    • edit: clang/lib/Serialization/ASTWriterDecl.cpp