Trigger the bug

This bug occurs in Dart version 1.6.0.

Run these commands:

git clone https://github.com/unixpickle/dart_mixin_bug.git
cd dart_mixin_bug
dartanalyzer lib/mixin_bug.dart

I get an exception:

NoSuchMethodError: method not found: 'substitute2'
Receiver: null
Arguments: [_List len:0, _List len:0]
#0      Object.noSuchMethod (dart:core-patch/object_patch.dart:45)
#1      TypeResolverVisitor._createImplicitContructor (package:analyzer/src/generated/resolver.dart:23556)
#2      TypeResolverVisitor.visitClassTypeAlias (package:analyzer/src/generated/resolver.dart:23035)
#3      ClassTypeAlias.accept (package:analyzer/src/generated/ast.dart:3798)
#4      NodeList.accept (package:analyzer/src/generated/ast.dart:19469)
#5      CompilationUnit.visitChildren (package:analyzer/src/generated/ast.dart:4272)
...

So, yeah, it screws up the Dart Editor and makes me sad.

The underlying bug

The analyzer crashes when a file performs a mixin application between classes that aren't declared in that file.

Workaround

For now, you'll just have to do your mixin declarations and other class ... = ... stuff in the main file for your library.