[Swift CI] Build Failure: 0. OSS - Swift Incremental RA - OS X (master) #7249

<rdar://problem/29067451> testParallelLookupsAndReturnError: malloc: *** error for object 0x7fa25a101b88: incorrect checksum for freed object - object was probably modified after being freed.

···

On 17-Nov-2016, at 8:12 PM, no-reply@swift.org wrote:

[FAILURE] oss-swift-incremental-RA-osx [#7249]

Build URL: https://ci.swift.org/job/oss-swift-incremental-RA-osx/7249/
Project: oss-swift-incremental-RA-osx
Date of build: Thu, 17 Nov 2016 06:14:49 -0800
Build duration: 27 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-osx/7249/consoleFull#-1007744702ee1a197b-acac-4b17-83cf-a53b95139a76&gt;
Tests:

Name: Swift(macosx-x86_64)
Failed: 0 test(s), Passed: 8568 test(s), Total: 8568 test(s)
Name: Swift-Unit
Failed: 0 test(s), Passed: 359 test(s), Total: 359 test(s)

Changes

Commit 7f99c4002a2156d1f4d2e5b1ec99397063964f3e by ankit.spd:
Add build from source notes

edit: docs/development.rst

Commit e3adf8e2eb7cfdafe88b8489b23d11d9156e10bf by ankit_aggarwal:
[PackageToolTest] Switch from building to checking contents of checkout

edit: Tests/CommandsTests/PackageToolTests.swift