Unexpected de-indent after trivia after expression

[nojaf]

Issue created from fantomas-online

Code

namespace X
module TopologicalBuilderTests =

    [<Fact>]
    let ``Builder works with ANY backend (backend-agnostic principle)`` () = task {
        let program = topological simulatorBackend {
            return ()
        }

        match! TopologicalBuilder.execute simulatorBackend program with
        | Ok _ -> Assert.True(true)
        | Error err -> Assert.Fail($"Program failed: {err.Message}")

        // Programs are COMPLETELY backend-agnostic!
    }

    [<Fact>]
    let ``Builder with braiding sequence`` () =
        task {
            // Increased backend capacity to 20 anyons to support 6 logical qubits
            let backend = TopologicalUnifiedBackendFactory.createUnified AnyonSpecies.AnyonType.Ising 20

            ()
        }

Result

namespace X

module TopologicalBuilderTests =

    [<Fact>]
    let ``Builder works with ANY backend (backend-agnostic principle)`` () =
        task {
            let program = topological simulatorBackend { return () }

            match! TopologicalBuilder.execute simulatorBackend program with
            | Ok _ -> Assert.True(true)
            | Error err -> Assert.Fail($"Program failed: {err.Message}")

            // Programs are COMPLETELY backend-agnostic!
            }

        [<Fact>]
    let ``Builder with braiding sequence`` () =
        task {
            // Increased backend capacity to 20 anyons to support 6 logical qubits
            let backend =
                TopologicalUnifiedBackendFactory.createUnified AnyonSpecies.AnyonType.Ising 20

            ()
        }

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Extra information

• The formatted result breaks my code.
• The formatted result gives compiler warnings.
• I or my company would be willing to help fix this.
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Options

Fantomas main branch at 2026-09-16T05:44:15Z - 37913d5

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