Formatting Program.fs with --check fails

[nojaf]

Command line bug:
I tried to format Program.fs.
This worked fine with:

❯ dotnet fantomas  --config .\fantomas-config.json .\EventSourced\Program.fs
Processing .\EventSourced\Program.fs
.\EventSourced\Program.fs has been written.

but fails with --check.

dotnet fantomas  --config .\fantomas-config.json .\EventSourced\Program.fs --check
error: Failed to format .\EventSourced\Program.fs: Fantomas.FormatConfig+FormatException: Parsing failed with errors: [|.\EventSourced\Program.fs (1,1)-(2,1) parse error Files in libraries or multiple-file applications must begin with a namespace or module declaration, e.g. 'namespace SomeNamespace.SubNamespace' or 'module SomeNamespace.SomeModule'. Only the last source file of an application may omit such a declaration.|]
And options: { SourceFiles = [|".\EventSourced\Program.fs"|]
  ConditionalCompilationDefines = []
  ErrorSeverityOptions = { WarnLevel = 3
                           GlobalWarnAsError = false
                           WarnOff = []
                           WarnOn = []
                           WarnAsError = []
                           WarnAsWarn = [] }
  IsInteractive = false
  LightSyntax = None
  CompilingFsLib = false
  IsExe = false }
   at Fantomas.CodeFormatterImpl.parse@61-2.Invoke(FSharpParseFileResults _arg2) in C:\Users\nojaf\Projects\fantomas\src\Fantomas\CodeFormatterImpl.fs:line 66
   at Microsoft.FSharp.Control.AsyncPrimitives.CallThenInvokeNoHijackCheck[a,b](AsyncActivation`1 ctxt, FSharpFunc`2 userCode, b result1) in F:\workspace\_work\1\s\src\fsharp\FSharp.Core\async.fs:line 417
   at <StartupCode$FSharp-Compiler-Service>.$Service.ParseFile@423-3.Invoke(AsyncActivation`1 ctxt) in C:\projects\fsharp-compiler-service\src\fsharp\service\service.fs:line 423
   at Microsoft.FSharp.Control.Trampoline.Execute(FSharpFunc`2 firstAction) in F:\workspace\_work\1\s\src\fsharp\FSharp.Core\async.fs:line 109
.\EventSourced\Program.fs needs formatting