Embedded resources with extension other than *.resx are named incorrectly if a source code file with the same name is present(.NET Core 3.0 release)

[aerworker]

ConsoleApp1.zip

Steps to reproduce

Build and run attached application.

dotnet build ConsoleApp1.csproj
bin\Debug\netcoreapp3.0\ConsoleApp1.exe

Note that SomeFile3.cs is depended upon SomeFile3.SomeExtension.
Project file

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp3.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <None Remove="SomeFile1.SomeExtension" />
    <None Remove="SomeFile2.SomeExtension" />
    <None Remove="SomeFile3.SomeExtension" />
  </ItemGroup>

  <ItemGroup>
    <EmbeddedResource Include="SomeFile1.SomeExtension" />
    <EmbeddedResource Include="SomeFile2.SomeExtension" />
    <EmbeddedResource Include="SomeFile3.SomeExtension" />
  </ItemGroup>

  <ItemGroup>
    <Compile Update="SomeFile3.cs">
      <DependentUpon>SomeFile3.SomeExtension</DependentUpon>
    </Compile>
  </ItemGroup>
</Project>

Directory contents:

/
-Program.cs
-SomeClass1.cs
-SomeClass1.resx
-SomeFile1.SomeExtension
-SomeFile2.cs
-SomeFile2.SomeExtension
-SomeFile3.cs
-SomeFile3.SomeExtension

Expected behavior

program output should include:

ConsoleApp1.SomeClass1.resources
ConsoleApp1.SomeFile1.SomeExtension
ConsoleApp1.SomeFile2.SomeExtension
ConsoleApp1.SomeFile3.SomeExtension

or at least

ConsoleApp1.SomeClass1.resources
ConsoleApp1.SomeFile1.SomeExtension
ConsoleApp1.Class2.SomeExtension
ConsoleApp1.SomeFile3.SomeExtension

Actual behavior

program output include:

ConsoleApp1.SomeClass1.resources
ConsoleApp1.SomeFile1.SomeExtension
ConsoleApp1.Class2
ConsoleApp1.Class3

Environment data

dotnet --version output:
3.0.100

[rainersigwald]

Thank you for the report. Closing in favor of the copy we're actively investigating.

[rainersigwald]

Duplicate of #4740