main.dart ``` import 'lib.dart'; mixin D { _test(); } main() { P()._test(); } ``` lib.dart ``` import 'main.dart'; class P with D {} ``` The analyzer show no errors, but it crashed in running: ``` Unhandled exception: NoSuchMethodError: Class 'P' has no instance method '_test'. Receiver: Instance of 'P' Tried calling: _test() #0 Object.noSuchMethod (dart:core-patch/object_patch.dart:63:5) ... ```