[Swift CI] Build Failure: 0. OSS - Swift Incremental RA - Ubuntu 16.10 (master) #1980

This seems unrelated to my commit as its a CLF test that is failing:

TestURLSession.test_simpleUploadWithDelegate : XCTAssertEqual failed: ("0") is not equal to ("16384") -

···

On 13 Dec 2017, at 16:25, swift-ci@swift.org wrote:

[FAILURE] oss-swift-incremental-RA-linux-ubuntu-16_10 [#1980]

Build URL: https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-16_10/1980/
Project: oss-swift-incremental-RA-linux-ubuntu-16_10
Date of build: Wed, 13 Dec 2017 08:34:15 -0600
Build duration: 51 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-16_10/1980/consoleFull#-3002049213122a513-f36a-4c87-8ed7-cbc36a1ec144>
Tests:

Name: Swift(linux-x86_64)
Failed: 0 test(s), Passed: 10112 test(s), Total: 10112 test(s)
Name: Swift-Unit
Failed: 0 test(s), Passed: 486 test(s), Total: 486 test(s)

Changes

Commit c2e5ca704f93d68d4877720b5d8b204086119e24 by david:
Don’t include test targets from non-root packages

edit: Sources/TestSupport/PackageGraphTester.swift
edit: Sources/PackageGraph/PackageGraph.swift
edit: Tests/BuildTests/BuildPlanTests.swift
edit: Tests/PackageGraphTests/PackageGraphTests.swift