IssueTracker

Everyone's favorite bug but I bring a simple repro, so happy birthday!

Compose version: 1.7.4 Kotlin version: tried both 2.1.10 and 2.1.20

Steps to Reproduce or Code Sample to Reproduce:

@Composable
fun causeCrash() {
    key (Random.nextInt()) {
       if (true) {
           return // Return here causes crash
       }
    }
}

Our actual use case is extremely complex but is a bit more like this:

@Composable
fun causeCrash2(): Any? {
    val number = 0
    return key (number) {
        if (number % 2 == 0) {
            return null
        } else {
            if (LocalContext.current is Activity) {
                println("Hi")
            }
        }
        println("Got to end")
    }
    return Any()
}

The actual number comes from a unique ID. Some of the nesting inside of the return gets very deep and some cases call return, which seems to trigger the problem. I'm simulating it here where an even number triggers the early return (crashing) and an odd number doesn't (not crashing). I'm assuming it's the same issue as the simpler case, but I'm including both in case it's useful.

Stack trace (if applicable):

Process: com.example.startendimbalance, PID: 8293
androidx.compose.runtime.ComposeRuntimeError: Compose Runtime internal error. Unexpected or incorrect use of the Compose internal runtime API (Start/end imbalance). Please report to Google or use https://goo.gle/compose-feedback
	at androidx.compose.runtime.ComposerKt.composeImmediateRuntimeError(Composer.kt:4574)
	at androidx.compose.runtime.ComposerImpl.finalizeCompose(Composer.kt:4899)
	at androidx.compose.runtime.ComposerImpl.endRoot(Composer.kt:1671)
	at androidx.compose.runtime.ComposerImpl.doCompose(Composer.kt:3610)
	at androidx.compose.runtime.ComposerImpl.composeContent$runtime_release(Composer.kt:3522)
	at androidx.compose.runtime.CompositionImpl.composeContent(Composition.kt:743)
	at androidx.compose.runtime.Recomposer.composeInitial$runtime_release(Recomposer.kt:1122)
	at androidx.compose.runtime.CompositionImpl.composeInitial(Composition.kt:649)
	at androidx.compose.runtime.CompositionImpl.setContent(Composition.kt:635)
	at androidx.compose.ui.platform.WrappedComposition$setContent$1.invoke(Wrapper.android.kt:133)
	at androidx.compose.ui.platform.WrappedComposition$setContent$1.invoke(Wrapper.android.kt:124)
	at androidx.compose.ui.platform.AndroidComposeView.setOnViewTreeOwnersAvailable(AndroidComposeView.android.kt:1626)
	at androidx.compose.ui.platform.WrappedComposition.setContent(Wrapper.android.kt:124)
	at androidx.compose.ui.platform.WrappedComposition.onStateChanged(Wrapper.android.kt:180)
	at androidx.lifecycle.LifecycleRegistry$ObserverWithState.dispatchEvent(LifecycleRegistry.jvm.kt:320)
	at androidx.lifecycle.LifecycleRegistry.addObserver(LifecycleRegistry.jvm.kt:198)
	at androidx.compose.ui.platform.WrappedComposition$setContent$1.invoke(Wrapper.android.kt:131)
	at androidx.compose.ui.platform.WrappedComposition$setContent$1.invoke(Wrapper.android.kt:124)
	at androidx.compose.ui.platform.AndroidComposeView.onAttachedToWindow(AndroidComposeView.android.kt:1707)
	at android.view.View.dispatchAttachedToWindow(View.java:22860)
	at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3492)
	at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3499)
	at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3499)
	at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3499)
	at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3499)
	at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3443)
	at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:2917)
	at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:10324)
	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1406)
	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1415)
	at android.view.Choreographer.doCallbacks(Choreographer.java:1015)
	at android.view.Choreographer.doFrame(Choreographer.java:945)
	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1389)
	at android.os.Handler.handleCallback(Handler.java:959)
	at android.os.Handler.dispatchMessage(Handler.java:100)
	at android.os.Looper.loopOnce(Looper.java:232)
	at android.os.Looper.loop(Looper.java:317)
	at android.app.ActivityThread.main(ActivityThread.java:8705)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:580)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:886)