Idempotency problem when splitting && over multiple lines

[Smaug123]

Issue created from fantomas-online

Formatted code

namespace Bar

[<RequireQualifiedAccess>]
module Foo =
    /// Blah
    let bang<'a when 'a : equality> (a : Foo<'a>) (ans : ('a * System.TimeSpan) list) : bool =
        List.length x = List.length y
        && List.forall2
            (fun (a, ta) (b, tb) -> a.Equals b && ta = tb)
            x
            y

Reformatted code

namespace Bar

[<RequireQualifiedAccess>]
module Foo =
    /// Blah
    let bang<'a when 'a : equality> (a : Foo<'a>) (ans : ('a * System.TimeSpan) list) : bool =
        List.length x = List.length y
        && List.forall2 (fun (a, ta) (b, tb) -> a.Equals b && ta = tb) x y

Problem description

Fantomas was not able to produce the same code after reformatting the result.

We've lost the comment here. I haven't tracked down exactly which option causes this, sorry.

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 04/05/2021 16:09:34 - 31922c0

    { config with
                MaxLineLength = 100
                SpaceBeforeUppercaseInvocation = true
                SpaceBeforeClassConstructor = true
                SpaceBeforeMember = true
                SpaceBeforeColon = true
                SpaceBeforeSemicolon = true
                MultilineBlockBracketsOnSameColumn = true
                KeepIfThenInSameLine = true
                MultiLineLambdaClosingNewline = true
                KeepIndentInBranch = true }

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