You put auto-sizing text in a Table cell, hot-reloaded, and got this: LayoutBuilder does not support returning intrinsic dimensions. Calculating the intrinsic dimensions would require running the layout callback speculatively, which might mutate the live render object tree. at _RenderLayoutBuilder.computeMaxIntrinsicHeight The stack trace is long, it points at framework code you did not write, and the widget worked perfectly ten minutes ago in a Column . So the obvious f...