Error formatting defines #if (!DEBUG) ... #endif (no #else)

[kojo12228]

Issue created from fantomas-online

Code

namespace PmaBolero.Client

open Microsoft.AspNetCore.Components.WebAssembly.Hosting
open Microsoft.Extensions.DependencyInjection.Extensions
open Bolero.Remoting.Client

module Program =

    [<EntryPoint>]
    let Main args =
        let builder = WebAssemblyHostBuilder.CreateDefault(args)
        builder.RootComponents.Add<Pages.Main.MyApp>("#main")
        builder.Services
            .AddRemoting(builder.HostEnvironment)
            .Services
#if (!DEBUG)
            .RemoveAll<Microsoft.Extensions.Http.IHttpMessageHandlerBuilderFilter>()
#endif
            |> ignore
        builder.Build().RunAsync() |> ignore
        0

Error

System.Exception: Fantomas is trying to format the input multiple times due to the detect of multiple defines.
There is a problem with merging all the code back together.
[] has 2 fragments
[DEBUG] has 3 fragments
Please raise an issue at https://fsprojects.github.io/fantomas-tools/#/fantomas/preview.
   at Microsoft.FSharp.Core.PrintfModule.PrintFormatToStringThenFail@1439.Invoke(String message) in D:\a\_work\1\s\src\fsharp\FSharp.Core\printf.fs:line 1439
   at Fantomas.CodeFormatterImpl.format@410-3.Invoke(FSharpList`1 _arg2) in /home/runner/work/fantomas-tools/fantomas-tools/.deps/fantomas/src/Fantomas/CodeFormatterImpl.fs:line 436
   at Microsoft.FSharp.Control.AsyncPrimitives.CallThenInvokeNoHijackCheck[a,b](AsyncActivation`1 ctxt, b result1, FSharpFunc`2 userCode) in D:\a\_work\1\s\src\fsharp\FSharp.Core\async.fs:line 465
   at Fantomas.Async.map@167-2.Invoke(AsyncActivation`1 ctxt) in /home/runner/work/fantomas-tools/fantomas-tools/.deps/fantomas/src/Fantomas/Utils.fs:line 167
   at Microsoft.FSharp.Control.Trampoline.Execute(FSharpFunc`2 firstAction) in D:\a\_work\1\s\src\fsharp\FSharp.Core\async.fs:line 105

Problem description

Please describe here the Fantomas problem you encountered.
Check out our Contribution Guidelines.

Trying to format ASP.NET-style code which uses #if (!DEBUG) to remove certain logging. Originally I was using #if RELEASE and found out this isn't the way to go about it.

Happy to try and fix this if you can point me in the right direction.

Extra information

• The formatted result breaks by code.
• The formatted result gives compiler warnings.
• I or my company would be willing to help fix this.

Options

Fantomas master branch at 1/1/1990

Default Fantomas configuration

_{Did you know that you can ignore files when formatting from fantomas-tool or the FAKE targets by using a .fantomasignore file?}

[nojaf]

Hello, thank you for reporting this problem!
I noticed it is a trivia problem, slightly easier to detect when changing the #if to a comment.
(Sample).

The solution will probably be something similar to the fix of #2063.
I'll take a closer look later this week.

[nojaf]

The problem was indeed very similar.
Would you like to have a release with this fix?

[kojo12228]

Fantastic, no rush as it is by no means a critical project but yes a release would be appreciated, I'll continue testing my Bolero project when the fix is in.

[nojaf]

Great, I'll probably pick this up on Friday.

[kojo12228]

Thanks, using 4.6.5 I was able to format my project!

[nojaf]

Thanks for confirming!