Getting compiler errors with latest C++ compiler (VS2019 Preview 3.1)

[FStapenhorst]

Hi,

I downloaded the ATLCollections sample and tried to compile it using Visual Studio 2019 Preview 3.1. It works fine when selecting default settings in "Project Settings - General - C++ Language Standard" setting.
When selecting "Preview - Features from the Latest C++ Working Draft (/std:c++latest)" as the C++ Language Standard, I get the following compiler errors:

1>------ Build started: Project: ATLCollections, Configuration: Debug Win32 ------
1>StdAfx.cpp
1>ATLCollections.cpp
1>E:\Users\f.stapenhorst\Downloads\ATLCollections\Reuse\VCUE_Collection.h(160,17): error C3861: 'm_coll': identifier not found
1>E:\Users\f.stapenhorst\Downloads\ATLCollections\Reuse\VCUE_Collection.h(168): message : see reference to class template instantiation 'VCUE::ICollectionOnSTLCopyImpl<T,CollType,ItemType,CopyItem,EnumType,Holder>' being compiled
1>MapCollection.cpp
1>E:\Users\f.stapenhorst\Downloads\ATLCollections\Reuse\VCUE_Collection.h(160,17): error C3861: 'm_coll': identifier not found
1>E:\Users\f.stapenhorst\Downloads\ATLCollections\Reuse\VCUE_Collection.h(168): message : see reference to class template instantiation 'VCUE::ICollectionOnSTLCopyImpl<T,CollType,ItemType,CopyItem,EnumType,Holder>' being compiled
1>StringCollection.cpp

Any idea what the issue might be?