Local variables are treated as properties

[taisuke-fujimoto]

Expected Behavior

This code should not have any lint errors.

package my

import io.kotest.core.spec.style.StringSpec

@Suppress("LocalVariableName")
class SampleTest :
    StringSpec({
        val _test = "test"
        println(_test)
    })

@Suppress("LocalVariableName")
fun test() {
    val _test = "test"
    println(_test)
}

Observed Behavior

This code reports the following lint errors:

Sandbox.kt:8:13 Backing property not allowed when 'private' modifier is missing (cannot be auto-corrected)
Sandbox.kt:8:13 Backing property is only allowed when a matching property or function exists (cannot be auto-corrected)
Sandbox.kt:14:9 Backing property not allowed when 'private' modifier is missing (cannot be auto-corrected)
Sandbox.kt:14:9 Backing property is only allowed when a matching property or function exists (cannot be auto-corrected)

it seems that local variables are treated as properties.

Steps to Reproduce

Your Environment

• Version of ktlint used: 1.3.1
• Relevant parts of the .editorconfig settings : no settings
• Name and version (or code for custom task) of integration used (Gradle plugin, Maven plugin, command line, custom Gradle task): Ktlint Gradle plugin 12.1.1
• Version of Gradle used (if applicable): 8.10
• Operating System and version: Windows 11

[paul-dingemans]

it seems that local variables are treated as properties.

From the perspective of the Kotlin Parser, the local variable is indeed a property:

It seems that your expectation is that the @Suppress("LocalVariableName") would also supress the ktlint violation. This is a small fix which makes sense to me.

Until this is implemented, you can suppress the ktlint violation explicitly:

@Suppress("LocalVariableName", "ktlint:standard:backing-property-naming")
fun test() {
    val _test = "test"
    println(_test)
}