flutter-errors

A RenderFlex overflow occurs when a Row or Column contains children wider or taller than the available space. Wrap the overflowing child in Expanded or Flexible, or constrain its size with SizedBox so it fits within the available bounds.

This error happens when a ListView or other scrollable sits inside a Column without a bounded height. Wrap the ListView in Expanded, or give it a fixed height using SizedBox so the viewport receives finite constraints.

This error occurs when setState or showDialog is called directly inside the build method. Move state changes to user event handlers, or defer them using WidgetsBinding.instance.addPostFrameCallback in initState.

No, a single ScrollController attached to multiple scrollable widgets simultaneously triggers an error. Create a dedicated ScrollController instance for each scrollable widget in your widget tree.

Use the Flutter Inspector in DevTools to visualize widget constraints and enable Show Guidelines to see layout boundaries. You can also set debugPaintSizeEnabled to true in main() to paint layout bounds directly on screen.