[Swift CI] Build Failure: OSS - Swift Package - OS X (master) #4870

# [FAILURE] oss-swift-package-osx [#4870]

Build URL: https://ci.swift.org/job/oss-swift-package-osx/4870/
Project: oss-swift-package-osx
Date of build: Fri, 19 Jun 2020 05:16:16 -0500
Build duration: 52 min

Identified problems:- Sandbox issue: Known sandbox issue

Changes- Commit 96a0962c9c0aea1f5ee9c47e322e65c3871aeb7d by github:

[docs] stdlib guide - fix legacy naming

  • edit: docs/StandardLibraryProgrammersManual.md

  • Commit da797fef7d80b84fce261f0f8b95e6207f99b80d by mgottesman:

    [sil-opt] Add EnablePrettyStackTraceOnSigInfoForThisThread like we do in

    • edit: tools/sil-opt/SILOpt.cpp
  • Commit 8541774208fc8f9b876903ecf1a97eccec6e4785 by mgottesman:

    [semantic-arc-opts] Extract out the conversion of owned -> guaranteed

    • edit: lib/SILOptimizer/Transforms/SemanticARCOpts.cpp