PR: #11862 Remove unnecessary fields from CompletionHelper. by @CyrusNajmabadi
Failure: http://dotnet-ci.cloudapp.net/job/Private/job/dotnet_roslyn-internal/job/master/job/windows_vsi_p2_open_prtest/90/

Issue 1: Build Script
A script in the build failed to execute correctly causing a build failure.

Issue 2: MSBuild Error
error MSB3073: The command ""d:\j\workspace\windows_vsi_p---5fa6ff52\Closed\Tools\ibcmerge\ibcmerge.exe" -q -f -partialNGEN -minify -mo "d:\j\workspace\windows_vsi_p---5fa6ff52\Open\Binaries\Obj\EditorFeatures\Release\Microsoft.CodeAnalysis.EditorFeatures.dll" -incremental "d:\j\workspace\windows_vsi_p---5fa6ff52\Closed\OptimizationData\Microsoft.CodeAnalysis.EditorFeatures.pgo"" exited with code -1. [d:\j\workspace\windows_vsi_p---5fa6ff52\Open\src\EditorFeatures\Core\EditorFeatures.csproj]