kotlin:S6311 raises a false-positive for Android ViewModel coroutines usage

[jonnyandrewgds (Jonny Andrew)]

Make sure to read this post before raising a thread here:

How to Report a False-positive / False-negative

Hey SonarSource Community! False-positives happen, as do false-negatives, and we’re eager to fix them. We are thrilled when our users report problems, so we can make our products better. What is a false-positive (FP)? A false-positive is when an issue is raised unexpectedly on code that should not trigger an issue, or where the suggested action doesn’t make any sense for the code. What is a false-negative (FN)? A false-negative is when an issue should be raised on a piece of code, but isn’t. …

Then tell us:

• Which product: Sonarqube Cloud
• What language is this for? Kotlin
• Which rule? kotlin:S6311
• Why do you believe it’s a false-positive/false-negative? This is idiomatic usage according to official Android documentation: Best practices for coroutines in Android  |  Kotlin  |  Android Developers
• How can we reproduce the problem? Self contained snippet:

class MyViewModel() : ViewModel() {

    private val _actions = MutableSharedFlow<Unit>()
    val actions: Flow<Unit> = _actions

    fun nonSuspendingFunction() {
        viewModelScope.launch {
            _actions.emit(Unit)
        }
    }
}

[egon.okerman]

Hey Jonny,

Thanks for letting us know.

kotlin:S6311 has a bug currently, which causes it to raise an issue in cases such as the snippet you gave. There is a fix underway and it should be corrected by the next release.

[egon.okerman]

Hello,

I just wanted to provide an update about this topic. The fix is live on SonarQube Cloud and was shipped with SonarQube 2025.2. If you still experience issues with this rule, feel free to reach out.