Hash defines in let binding

[nojaf]

Issue created from fantomas-online

Code

let inputFileFlagsFsiBase (_tcConfigB: TcConfigBuilder) =
#if NETSTANDARD
    [ CompilerOption("usesdkrefs", tagNone, OptionSwitch (SetUseSdkSwitch _tcConfigB), None, Some (FSComp.SR.useSdkRefs())) ]
#else
    List.empty<CompilerOption>
#endif

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 togheter. Please raise an issue at https://github.com/fsprojects/fantomas/issues.
   at Microsoft.FSharp.Core.PrintfModule.PrintFormatToStringThenFail@1433.Invoke(String message) in D:\workspace\_work\1\s\src\fsharp\FSharp.Core\printf.fs:line 1433
   at Fantomas.String.merge(String a, String b) in /home/runner/work/fantomas-tools/fantomas-tools/.deps/fantomas/src/Fantomas/Utils.fs:line 62
   at Microsoft.FSharp.Collections.ListModule.Fold[T,TState](FSharpFunc`2 folder, TState state, FSharpList`1 list) in D:\workspace\_work\1\s\src\fsharp\FSharp.Core\list.fs:line 222
   at Microsoft.FSharp.Collections.ListModule.Reduce[T](FSharpFunc`2 reduction, FSharpList`1 list) in D:\workspace\_work\1\s\src\fsharp\FSharp.Core\list.fs:line 234
   at Fantomas.CodeFormatterImpl.format@401-1.Invoke(Tuple`3[] _arg1) in /home/runner/work/fantomas-tools/fantomas-tools/.deps/fantomas/src/Fantomas/CodeFormatterImpl.fs:line 410
   at Microsoft.FSharp.Control.AsyncPrimitives.CallThenInvokeNoHijackCheck[a,b](AsyncActivation`1 ctxt, FSharpFunc`2 userCode, b result1) in D:\workspace\_work\1\s\src\fsharp\FSharp.Core\async.fs:line 404
   at Microsoft.FSharp.Control.Trampoline.Execute(FSharpFunc`2 firstAction) in D:\workspace\_work\1\s\src\fsharp\FSharp.Core\async.fs:line 104

Problem description

Not sure what's up here.

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 at 03/26/2021 17:43:48 - cdf6308

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?}