Just going through my crash logs. My #1 crash, 14.73% is DropShadowEffect is crashing on Windows if the radius is 0. This is very easy to reproduce as seen here: juce_bugs/DropShadowEffectCrash/Source/MainComponent.h at 808bec8a18d2d32cb8c9b4e2f4871e48c197a01b · FigBug/juce_bugs · GitHub
Create a component and add a DropShadowEffect with a nice valid drop shadow size of 2.
Then apply a transform so that the drop shadow size rounds to 0.
Boom!