Issue 8027. Disallow cyclic mixins.

compiler/javatests/com/google/dart/compiler/type/TypeAnalyzerCompilerTest.java

Index: compiler/javatests/com/google/dart/compiler/type/TypeAnalyzerCompilerTest.java
diff --git a/compiler/javatests/com/google/dart/compiler/type/TypeAnalyzerCompilerTest.java b/compiler/javatests/com/google/dart/compiler/type/TypeAnalyzerCompilerTest.java
index f058ab172eb1311006563077d3a9699fc822706b..137bf358cf47684d7d6528a14846a03c60c48ae1 100644
--- a/compiler/javatests/com/google/dart/compiler/type/TypeAnalyzerCompilerTest.java
+++ b/compiler/javatests/com/google/dart/compiler/type/TypeAnalyzerCompilerTest.java
@@ -6479,5 +6479,15 @@ public class TypeAnalyzerCompilerTest extends CompilerTestCase {
         result.getErrors(),
         errEx(TypeErrorCode.NOT_A_MEMBER_OF, 13, 5, 2));
   }
+
+  public void test_mixin_disallowMixinApplication_asMixin() throws Exception {
+    AnalyzeLibraryResult result = analyzeLibrary(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "typedef M = Object with M;",
+        "");
+    assertErrors(
+        result.getErrors(),
+        errEx(ResolverErrorCode.CANNOT_MIXIN_CLASS_WITH_MIXINS, 2, 25, 1));
+  }
   
 }