Tools are already initialized
+ /root/git/dotnet/source-build/Tools/dotnetcli/dotnet /root/git/dotnet/source-build/Tools/dotnetcli/sdk/3.0.100-preview-010021/MSBuild.dll /root/git/dotnet/source-build/build.proj /bl:build.binlog /flp:v=diag /clp:v=m /p:RootRepo=core-setup
Microsoft (R) Build Engine version 16.0.352-preview+gb9c3b3d42a for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

/root/git/dotnet/source-build/Tools/dotnetcli/sdk/3.0.100-preview-010021/MSBuild.dll /bl:build.binlog /clp:v=m /flp:v=diag /p:RootRepo=core-setup /root/git/dotnet/source-build/build.proj
  Building dependencies [coreclr;corefx;newtonsoft-json;newtonsoft-json901;roslyn;standard] needed by 'core-setup'.
  Building dependencies [linker;roslyn] needed by 'coreclr'.
  linker using package version properties saved at /root/git/dotnet/source-build/bin/obj/x64/Release/PackageVersions.props.pre.linker.xml 
  Checked cache for conflicts with source-built nupkgs. Took 00:00:00.0001207
  Building 'linker'
  Running command:
    /root/git/dotnet/source-build/Tools/dotnetcli3/dotnet restore /bl:restore.binlog /root/git/dotnet/source-build/bin/src/linker.15b5a5f682a3f3345f473b655d51940bdd8fd1a8/illink.sln /p:ILLinkBuild=true /p:NetStandard=true 
    Log: /root/git/dotnet/source-build/bin/logs/linker.log
    With Environment Variables:
      DotNetToolPath=/root/git/dotnet/source-build/Tools/dotnetcli/
      DotNetTool=/root/git/dotnet/source-build/Tools/dotnetcli/dotnet
      BUILD_TOOLS_TOOL_DIR=/root/git/dotnet/source-build/Tools/
      BUILDTOOLS_SKIP_CROSSGEN=1
      DotNetBuildFromSource=true
      DotNetRestorePackagesPath=/root/git/dotnet/source-build/packages/
      DotNetBuildToolsDir=/root/git/dotnet/source-build/Tools/source-built
      DOTNET_HOST_PATH=/root/git/dotnet/source-build/Tools/dotnetcli/dotnet
      _InitializeToolset=/root/git/dotnet/source-build/Tools/source-built/Microsoft.DotNet.Arcade.Sdk/tools/Build.proj
      BuildToolsPackageDir=/root/git/dotnet/source-build/Tools/source-built
      StabilizePackageVersion=false
      PB_IsStable=false
      PackageVersionStamp=preview6
      PB_VersionStamp=preview6
      PreReleaseVersionLabel=preview6
      DotNetUseShippingVersions=true
      ContinuousIntegrationBuild=true
      MSBUILDDEBUGPATH=/root/git/dotnet/source-build/bin/msbuild-debug/
      MSBUILDDEBUGCOMM=1
      MSBUILDDEBUGSCHEDULER=1
      MSBUILDDEBUGFORCECACHING=1
      MSBUILDDEBUG=1
      MSBUILDDEBUGEVALUATION=1
      MSBUILDTARGETOUTPUTLOGGING=1
      MSBUILDLOGTASKINPUTS=1
      MSBUILDEMITSOLUTION=1
      MSBUILDLOGVERBOSERARSEARCHRESULTS=1
      RoslynCommandLineLogFile=/root/git/dotnet/source-build/bin/roslyn-debug/
      MSBUILDDISABLENODEREUSE=1
      OfficialBuildId=20190531.1
      BUILD_BUILDNUMBER=20190531.1
      GitCommitCount=
      GitCommitHash=15b5a5f682a3f3345f473b655d51940bdd8fd1a8
      SourceRevisionId=15b5a5f682a3f3345f473b655d51940bdd8fd1a8
      RepositoryCommit=15b5a5f682a3f3345f473b655d51940bdd8fd1a8
      RepositoryType=Git
      RepositoryUrl=/~https://github.com/dotnet/source-build
      DeterministicSourcePaths=false
      DOTNET_TOOL_DIR=/root/git/dotnet/source-build/Tools/dotnetcli3/
      DotNetCoreSdkDir=/root/git/dotnet/source-build/Tools/dotnetcli3/
      DotNetRoot=/root/git/dotnet/source-build/Tools/dotnetcli3/
      _InitializeDotNetCli=/root/git/dotnet/source-build/Tools/dotnetcli3/
      SOURCE_BUILT_SDK_ID_ARCADE=Microsoft.DotNet.Arcade.Sdk
      SOURCE_BUILT_SDK_VERSION_ARCADE=1.0.0-dev
      SOURCE_BUILT_SDK_DIR_ARCADE=/root/git/dotnet/source-build/Tools/source-built/Microsoft.DotNet.Arcade.Sdk/
  Segmentation fault (core dumped)
/root/git/dotnet/source-build/repos/dir.targets(281,5): error MSB3073: The command "/root/git/dotnet/source-build/Tools/dotnetcli3/dotnet restore /bl:restore.binlog /root/git/dotnet/source-build/bin/src/linker.15b5a5f682a3f3345f473b655d51940bdd8fd1a8/illink.sln /p:ILLinkBuild=true /p:NetStandard=true /v:minimal  >> /root/git/dotnet/source-build/bin/logs/linker.log 2>&1" exited with code 139. [/root/git/dotnet/source-build/repos/linker.proj]
  ERROR: ld.so: object '/usr/lib/libpthread.so' from LD_PRELOAD cannot be preloaded: ignored.
  
  'linker' failed during build.
  See '/root/git/dotnet/source-build/bin/logs/linker.log' for more information.
  'coreclr' failed during build.
  'core-setup' failed during build.