Locale warnings during MVC Core application publish process

Steps to reproduce

An ASP.NET Core MVC application that self-publishes within its own Docker image based on microsoft/dotnet:1.1.1-sdk and sets its locale information using the following commands:

ENV LANG en_GB.UTF-8
ENV LANGUAGE en_GB:en
ENV LC_ALL en_GB.UTF-8

Expected behavior

Publish without errors or warnings.

Actual behavior

The following warnings, which seem to occur once per project:

Microsoft (R) Build Engine version 15.1.548.43366
Copyright (C) Microsoft Corporation. All rights reserved.
bash : warning : setlocale: LC_ALL: cannot change locale (en_GB.UTF-8) [/tmp/src/Library/Library.csproj]
Library -> /tmp/src/Library/bin/Release/netcoreapp1.1/Library.dll
bash : warning : setlocale: LC_ALL: cannot change locale (en_GB.UTF-8) [/tmp/src/WebApp/WebApp.csproj]
WebApp -> /tmp/src/WebApp/bin/Release/netcoreapp1.1/WebApp.dll
Razor view compilation for WebApp -> obj/Release/netcoreapp1.1/WebApp.PrecompiledViews.dll

They are just warnings, and I haven’t noticed any larger issues that I would attribute to them, but I’d like to understand what could be causing them? There were no warnings when using the project.json cli to publish.

Environment data

Docker environment derived from microsoft/dotnet:1.1.1-sdk.

[livarcocc]

Can we close this issue? Thanks for looking @MichaelSimons

[svallis]

@MichaelSimons Understood and agreed. Appreciate your help, thanks.