Description

When the property <TreatWarningsAsErrors>true</TreatWarningsAsErrors> is included in the fsproj file, the Fable compiler still issues warnings instead of errors.

Repro code

Test.fsproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>
    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
  </PropertyGroup>

  <ItemGroup>
    <Compile Include="Library.fs" />
  </ItemGroup>

</Project>

Library.fs

module WarnAsErrorTest

type Message = Load | Save | Exit

let message =
    function
    | Load -> printfn "Loading"
    | Save -> printfn "Saving"

Expected and actual results

Expected

Running dotnet fable should print an error message.

Actual

Running dotnet build does print an error message.

Running dotnet fable does not print an error message.

Related information

• Fable version: dotnet fable --version : 3.2.12
• Operating system: Windows