Fantomas generating invalid F# when trying to format a list created with yields

[JackMatusiewiczGR]

Issue created from fantomas-online

When fantomas tries to format this code it will fail with a formatting exception

Code

type Foo = Foo of int

let getMore (i : int) = [Foo 5]

let choices : Foo list =
    [
        yield! getMore 9
        yield
            // Test
            Foo 2
    ]

Error

Fantomas was able to format the code but the result appears to be invalid F# code.
Please open an issue.

Formatted result:

type Foo = Foo of int

let getMore (i: int) = [ Foo 5 ]

let choices: Foo list =
    [ yield! getMore 9
      yield
      // Test
      Foo 2 ]

Options

Fantomas Master at 06/02/2020 18:39:46 - eee0f32

Name	Value
IndentSpaceNum	4
PageWidth	120
SemicolonAtEndOfLine	false
SpaceBeforeParameter	true
SpaceBeforeLowercaseInvocation	true
SpaceBeforeUppercaseInvocation	false
SpaceBeforeClassConstructor	false
SpaceBeforeMember	false
SpaceBeforeColon	false
SpaceAfterComma	true
SpaceBeforeSemicolon	false
SpaceAfterSemicolon	true
IndentOnTryWith	false
SpaceAroundDelimiter	true
MaxIfThenElseShortWidth	40
MaxInfixOperatorExpression	50
MaxRecordWidth	40
MaxArrayOrListWidth	40
MaxLetBindingWidth	40
MultilineBlockBracketsOnSameColumn	false
NewlineBetweenTypeDefinitionAndMembers	false
KeepIfThenInSameLine	false
StrictMode	false