IssueTracker

Jetpack Compose version: 2024.11.00
Jetpack Compose component used: androidx.compose.ui:ui
Android Studio Build: Android Studio Ladybug | 2024.2.1 Patch 2
Kotlin version: 2.0.21

Hello,

In a large Jetpack Compose codebase with extensive custom focus behaviours, using FocusRequester can result in a runtime exception if certain conditions are not met (e.g., missing focusRequester on a composable node).

The stack trace only shows internal Compose framework calls, providing no clues about the specific Composable or node responsible for the crash.

Ideally the error message or stack trace should be enhance to include information about the offending Composable or its position in the Compose tree.

This would make identifying and fixing issues much easier.

Fatal Exception: java.lang.IllegalStateException: 
FocusRequester is not initialized. Here are some possible fixes:

1. Remember the FocusRequester: val focusRequester = remember { FocusRequester() }
2. Did you forget to add a Modifier.focusRequester() ?
3. Are you attempting to request focus during composition? Focus requests should be made in
response to some event. Eg Modifier.clickable { focusRequester.requestFocus() }

at androidx.compose.ui.focus.FocusRequester.findFocusTarget(FocusRequester.kt:234)
at androidx.compose.ui.focus.FocusRequester.findFocusTargetNode$ui_release(FocusRequester.kt:71)
at androidx.compose.ui.focus.FocusRequester.focus$ui_release(FocusRequester.kt:67)
at androidx.compose.ui.focus.FocusTransactionsKt.performCustomEnter-Mxy_nc0(FocusTransactions.kt:297)
at androidx.compose.ui.focus.FocusTransactionsKt.performCustomRequestFocus-Mxy_nc0(FocusTransactions.kt:275)
at androidx.compose.ui.focus.FocusTransactionsKt.performCustomRequestFocus-Mxy_nc0(FocusTransactions.kt:274)
at androidx.compose.ui.focus.FocusTransactionsKt.requestFocus-Mxy_nc0(FocusTransactions.kt:49)
at androidx.compose.ui.platform.AndroidComposeView$keyInputModifier$1$focusWasMovedOrCancelled$1.invoke(AndroidComposeView.android.kt:343)
at androidx.compose.ui.platform.AndroidComposeView$keyInputModifier$1$focusWasMovedOrCancelled$1.invoke(AndroidComposeView.android.kt:342)
at androidx.compose.ui.focus.FocusOwnerImpl$focusSearch$1.invoke(FocusOwnerImpl.kt:251)
at androidx.compose.ui.focus.FocusOwnerImpl$focusSearch$1.invoke(FocusOwnerImpl.kt:247)
at androidx.compose.ui.focus.TwoDimensionalFocusSearchKt.searchChildren-4C6V_qg(TwoDimensionalFocusSearch.kt:185)
at androidx.compose.ui.focus.TwoDimensionalFocusSearchKt.generateAndSearchChildren-4C6V_qg(TwoDimensionalFocusSearch.kt:155)
at androidx.compose.ui.focus.TwoDimensionalFocusSearchKt.searchChildren-4C6V_qg(TwoDimensionalFocusSearch.kt:188)
at androidx.compose.ui.focus.TwoDimensionalFocusSearchKt.generateAndSearchChildren-4C6V_qg(TwoDimensionalFocusSearch.kt:155)
at androidx.compose.ui.focus.TwoDimensionalFocusSearchKt.searchChildren-4C6V_qg(TwoDimensionalFocusSearch.kt:188)
at androidx.compose.ui.focus.TwoDimensionalFocusSearchKt.generateAndSearchChildren-4C6V_qg(TwoDimensionalFocusSearch.kt:155)
at androidx.compose.ui.focus.TwoDimensionalFocusSearchKt.searchChildren-4C6V_qg(TwoDimensionalFocusSearch.kt:188)
at androidx.compose.ui.focus.TwoDimensionalFocusSearchKt.generateAndSearchChildren-4C6V_qg(TwoDimensionalFocusSearch.kt:155)
at androidx.compose.ui.focus.TwoDimensionalFocusSearchKt.twoDimensionalFocusSearch-sMXa3k8(TwoDimensionalFocusSearch.kt:81)
at androidx.compose.ui.focus.TwoDimensionalFocusSearchKt.twoDimensionalFocusSearch-sMXa3k8(TwoDimensionalFocusSearch.kt:77)
at androidx.compose.ui.focus.TwoDimensionalFocusSearchKt.twoDimensionalFocusSearch-sMXa3k8(TwoDimensionalFocusSearch.kt:77)
at androidx.compose.ui.focus.FocusTraversalKt.focusSearch-0X8WOeE(FocusTraversal.kt:109)
at androidx.compose.ui.focus.FocusOwnerImpl.focusSearch-ULY8qGw(FocusOwnerImpl.kt:247)
at androidx.compose.ui.platform.AndroidComposeView$keyInputModifier$1.invoke-ZmokQxo(AndroidComposeView.android.kt:342)
at androidx.compose.ui.platform.AndroidComposeView$keyInputModifier$1.invoke(AndroidComposeView.android.kt:334)
at androidx.compose.ui.input.key.KeyInputNode.onKeyEvent-ZmokQxo(KeyInputModifier.kt:80)
at androidx.compose.ui.focus.FocusOwnerImpl.dispatchKeyEvent-YhN2O0w(FocusOwnerImpl.kt:275)
at androidx.compose.ui.focus.FocusOwner.dispatchKeyEvent-YhN2O0w$default(FocusOwner.kt:142)
at androidx.compose.ui.platform.AndroidComposeView.dispatchKeyEvent(AndroidComposeView.android.kt:945)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1959)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1959)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1959)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1959)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1959)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1959)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1959)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1959)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1959)
at com.android.internal.policy.DecorView.superDispatchKeyEvent(DecorView.java:476)
at com.android.internal.policy.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1861)
at android.app.Activity.dispatchKeyEvent(Activity.java:4085)
at androidx.core.app.ComponentActivity.superDispatchKeyEvent(ComponentActivity.kt:103)
at androidx.core.view.KeyEventDispatcher.dispatchKeyEvent(KeyEventDispatcher.java:85)
at androidx.core.app.ComponentActivity.dispatchKeyEvent(ComponentActivity.kt:117)
at androidx.appcompat.app.AppCompatActivity.dispatchKeyEvent(AppCompatActivity.java:604)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:59)
at androidx.appcompat.app.AppCompatDelegateImpl$AppCompatWindowCallback.dispatchKeyEvent(AppCompatDelegateImpl.java:3397)
at com.android.internal.policy.DecorView.dispatchKeyEvent(DecorView.java:390)
at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:5960)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5828)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5310)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5367)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5333)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5498)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5341)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5555)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5314)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5367)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5333)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5341)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5314)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5367)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5333)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5498)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5341)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5555)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5314)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5367)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5333)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5341)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5314)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5367)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5333)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5498)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5341)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5555)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5314)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:8093)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:8044)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:8005)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:8216)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:220)
at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
at android.os.MessageQueue.next(MessageQueue.java:335)
at android.os.Looper.loop(Looper.java:183)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

Thanks for considering.