diff --git a/AsyncDisplayKit/ASDisplayNode.mm b/AsyncDisplayKit/ASDisplayNode.mm index 2de5996f92..31c770cae6 100644 --- a/AsyncDisplayKit/ASDisplayNode.mm +++ b/AsyncDisplayKit/ASDisplayNode.mm @@ -695,6 +695,11 @@ static ASDisplayNodeMethodOverrides GetASDisplayNodeMethodOverrides(Class c) shouldMeasureAsync:(BOOL)shouldMeasureAsync measurementCompletion:(void(^)())completion { + if (_layout == nil) { + // constrainedSizeRange returns a struct and is invalid to call on nil. + // Defaulting to CGSizeZero can cause negative values in client layout code. + return; + } [self invalidateCalculatedLayout]; [self transitionLayoutWithSizeRange:_layout.constrainedSizeRange animated:animated