FormatException: Unexpected symbol '|' for DU case under pre-processor directive

[theimowski]

Issue created from fantomas-online

Code

type A =
    | B
#if DEBUG
    | C
#endif

Error

Fantomas.FormatConfig+FormatException: Parsing failed with errors: [|tmp.fsx (3,5)-(3,6) parse error Unexpected symbol '|' in implementation file|]
And options: { SourceFiles = [|"tmp.fsx"|]
  ConditionalCompilationDefines = ["DEBUG"]
  ErrorSeverityOptions = { WarnLevel = 3
                           GlobalWarnAsError = false
                           WarnOff = []
                           WarnOn = []
                           WarnAsError = []
                           WarnAsWarn = [] }
  IsInteractive = false
  LightSyntax = None
  CompilingFsLib = false
  IsExe = false }
   at Fantomas.CodeFormatterImpl.parse@76-2.Invoke(FSharpParseFileResults _arg2) in /home/runner/work/fantomas-tools/fantomas-tools/.deps/fantomas/src/Fantomas/CodeFormatterImpl.fs:line 82
   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 <StartupCode$FSharp-Compiler-Service>.$Service.ParseFile@457-3.Invoke(AsyncActivation`1 ctxt) in D:\workspace\_work\1\s\src\fsharp\service\service.fs:line 457
   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

When using conditional compilation with pre-processor directives, error occurs for a DU with case that is under that condition

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 02/26/2021 10:32:56 - 6464684

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?}