Hii, Im facing this Crash - iOS fatal: `ArrayIndex...

# compose

[Sagar Khurana]

Hii, Im facing this Crash - iOS fatal: ArrayIndexOutOfBoundsException in LazyStaggeredGridMeasure during LookaheadPass with StaggeredGridCells.Adaptive inside AnimatedPane

50+ crashes for 41 users in the last 7 days

[Sagar Khurana]

We're hitting a fatal crash in production on iOS (Compose Multiplatform 1.10.1, Compose Foundation 1.10.1):

kotlin.ArrayIndexOutOfBoundsException at LazyStaggeredGridMeasure.kt:269

Setup:
- LazyVerticalStaggeredGrid(columns = StaggeredGridCells.Adaptive(150.dp))
- Hosted in ListDetailPaneScaffold -> AnimatedPane
- Crash commonly occurs on back navigation (Detail -> Home)

Top of stack:

ThrowArrayIndexOutOfBoundsException (RuntimeUtils.kt:41)
  LazyStaggeredGridMeasure.measure (LazyStaggeredGridMeasure.kt:269)
  rememberStaggeredGridMeasurePolicy (LazyStaggeredGridMeasure.kt:184)
  LazyLayout (Composer.kt:189)
  InnerNodeCoordinator.LookaheadDelegateImpl.measure (MeasurePolicy.kt:88)
  CupertinoOverscrollNode.measure (Measurable.kt:30)
  LayoutModifierNodeCoordinator.LookaheadDelegateForLayoutModifierNode.measure
  LookaheadPassDelegate.remeasure (OwnerSnapshotObserver.kt:138)
  LookaheadPassDelegate.measure (LookaheadPassDelegate.kt:404)
  BoxMeasurePolicy.measure (Measurable.kt:30)

No app code at throw site, entirely within Compose framework.


Questions:
1) Is this a known issue for LookaheadScope + LazyVerticalStaggeredGrid + Adaptive columns on iOS?
2) Is there an existing issue ID / planned fix?
3) Should staggered grid measure guard lane-count changes across lookahead/actual passes?