Nullable dart bug

readme.md

Nullable dart bug

Created with <3 with dartpad.dev.

main.dart

void main() {
  String? x = test(null);
}
A test<A>(A a) =>
  switch((A,a.runtimeType)){
    (String,Null) => (){print("found nullable string"); return a;}(),    
    (String,_) => (){print("found nullable string"); return a;}(),
    (String?,_) => (){print("found nullable string"); return a;}(),
    (Type(),_) => (){print("failed to find nullable string for $A"); return a;}(),
  };