[Swift CI] Build Failure: 0. OSS - Swift Incremental RA - Ubuntu 14.04 (master) #2003

Seems unrelated to my change which should only affect benchmarks. Is this test known to be flaky?

******************** TEST 'Swift(linux-x86_64) :: AutolinkExtract/import_archive.swift' FAILED ********************
Script:

···

--
rm -rf "/home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/buildbot_incremental/swift-linux-x86_64/test-linux-x86_64/AutolinkExtract/Output/import_archive.swift.tmp" && mkdir -p "/home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/buildbot_incremental/swift-linux-x86_64/test-linux-x86_64/AutolinkExtract/Output/import_archive.swift.tmp"
/home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/buildbot_incremental/swift-linux-x86_64/bin/swiftc -target x86_64-unknown-linux-gnu -module-cache-path '/tmp/swift-testsuite-clang-module-cachebHZS3y' -emit-library -emit-module -emit-module-path /home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/buildbot_incremental/swift-linux-x86_64/test-linux-x86_64/AutolinkExtract/Output/import_archive.swift.tmp/empty.swiftmodule -module-name empty -module-link-name empty /home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/swift/test/AutolinkExtract/empty.swift
/home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/buildbot_incremental/swift-linux-x86_64/bin/swiftc -target x86_64-unknown-linux-gnu -module-cache-path '/tmp/swift-testsuite-clang-module-cachebHZS3y' -c /home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/swift/test/AutolinkExtract/import_archive.swift -I /home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/buildbot_incremental/swift-linux-x86_64/test-linux-x86_64/AutolinkExtract/Output/import_archive.swift.tmp -o /home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/buildbot_incremental/swift-linux-x86_64/test-linux-x86_64/AutolinkExtract/Output/import_archive.swift.tmp/import_experimental.o
llvm-ar cr /home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/buildbot_incremental/swift-linux-x86_64/test-linux-x86_64/AutolinkExtract/Output/import_archive.swift.tmp/import_experimental.a /home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/buildbot_incremental/swift-linux-x86_64/test-linux-x86_64/AutolinkExtract/Output/import_archive.swift.tmp/import_experimental.o
/home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/buildbot_incremental/swift-linux-x86_64/bin/swift-autolink-extract /home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/buildbot_incremental/swift-linux-x86_64/test-linux-x86_64/AutolinkExtract/Output/import_archive.swift.tmp/import_experimental.a -o - | /home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/swift/utils/PathSanitizingFileCheck --sanitize 'BUILD_DIR=/home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/buildbot_incremental/swift-linux-x86_64' --sanitize 'SOURCE_DIR=/home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/swift' --use-filecheck '/home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/buildbot_incremental/llvm-linux-x86_64/./bin/FileCheck' --check-prefix CHECK-elf /home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04/swift/test/AutolinkExtract/import_archive.swift
--
Exit Code: 254

Command Output (stderr):
--
<>clang-5.0: error: unable to execute command: Bus error (core dumped)
clang-5.0: error: linker command failed due to signal (use -v to see invocation)
<unknown>:0: error: link command failed with exit code 254 (use -v to see invocation)

On Dec 12, 2017, at 9:32 AM, no-reply@swift.org wrote:

[FAILURE] oss-swift-incremental-RA-linux-ubuntu-14_04 [#2003]

Build URL: https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/2003/
Project: oss-swift-incremental-RA-linux-ubuntu-14_04
Date of build: Tue, 12 Dec 2017 11:08:18 -0600
Build duration: 24 min
Identified problems:

Compile Error: This build failed because of a compile error. Below is a list of all errors in the build log:
Indication 1 <https://ci.swift.org//job/oss-swift-incremental-RA-linux-ubuntu-14_04/2003/consoleFull#-14087762523122a513-f36a-4c87-8ed7-cbc36a1ec144>
Regression test failed: This build failed because a regression test in the test suite FAILed. Below is a list of all errors:
Indication 1 <https://ci.swift.org//job/oss-swift-incremental-RA-linux-ubuntu-14_04/2003/consoleFull#-1112719381ba62d58e-7248-467b-91e0-c7508d5cf947>
Changes

Commit 30cbf7e9e528ae51b08971a5d01fc5220ec711ff by anemet:
Support opt-viewer with multi-source benchmarks as well

edit: benchmark/cmake/modules/AddSwiftBenchmarkSuite.cmake