Resolving Flutter Layout Errors Contents - Constraint Violation Diagnostics - Layout Error Resolution Workflow - Examples Constraint Violation Diagnostics Flutter layout operates on a strict rule: Constraints go down. Sizes go up. Parent sets position. Layout errors occur when this negotiation fails, typically due to unbounded constraints or unconstrained children. Diagnose layout failures using the following error signatures: "Vertical viewport was given unbounded height" : Triggered when a scrollable widget ( , ) is placed inside an unconstrained vertical parent ( ). The parent provides inf…