Expected Behavior

Formatting data classes with // comments should produce valid Kotlin code.

Observed Behavior

Auto fixing produces invalid Kotlin code that does not compile.

Steps to Reproduce

Run ktlint -f against the following Kotlin data class:

data class Foo(
    // Foo
    val foo: String,
    val bar: String,
)

Results in:

data class Foo(
    // Fooval foo: String, val bar: String,)

KtLint does not fail if you replace the // Foo comment with /* Foo */.

Your Environment

• Version of ktlint used: 1.3.0
• Relevant parts of the .editorconfig settings: An empty configuration reproduces this error.