--- a/langtools/src/share/classes/com/sun/tools/javac/model/JavacTypes.java	Tue Sep 07 17:32:27 2010 +0100
+++ b/langtools/src/share/classes/com/sun/tools/javac/model/JavacTypes.java	Tue Sep 07 17:32:52 2010 +0100
@@ -103,7 +103,7 @@
     public boolean contains(TypeMirror t1, TypeMirror t2) {
         validateTypeNotIn(t1, EXEC_OR_PKG);
         validateTypeNotIn(t2, EXEC_OR_PKG);
-        return ((Type) t1).contains((Type) t2);
+        return types.containsType((Type) t1, (Type) t2);
     }
 
     public boolean isSubsignature(ExecutableType m1, ExecutableType m2) {

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/api/TestContainTypes.java	Tue Sep 07 17:32:52 2010 +0100
@@ -0,0 +1,216 @@
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 6981185
+ * @summary  com.sun.tools.model.JavacTypes.contains() calls Type.contains instead of Types.containsType
+ * @run main TestContainTypes
+ */
+
+import java.net.URI;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+import javax.annotation.processing.AbstractProcessor;
+import javax.annotation.processing.RoundEnvironment;
+import javax.lang.model.element.Element;
+import javax.lang.model.element.TypeElement;
+import javax.lang.model.element.ExecutableElement;
+import javax.lang.model.type.TypeMirror;
+import javax.lang.model.type.DeclaredType;
+import javax.tools.JavaCompiler;
+import javax.tools.JavaFileObject;
+import javax.tools.SimpleJavaFileObject;
+import javax.tools.ToolProvider;
+
+import com.sun.source.util.JavacTask;
+import javax.annotation.processing.SupportedSourceVersion;
+import javax.lang.model.SourceVersion;
+
+public class TestContainTypes {
+
+    enum ClassType {
+        OBJECT("Object"),
+        NUMBER("Number"),
+        INTEGER("Integer"),
+        STRING("String");
+
+        String classStub;
+
+        ClassType(String classStub) {
+            this.classStub = classStub;
+        }
+
+        boolean subtypeOf(ClassType that) {
+            switch (that) {
+                case OBJECT: return true;
+                case NUMBER: return this == NUMBER || this == INTEGER;
+                case INTEGER: return this == INTEGER;
+                case STRING: return this == STRING;
+                default: throw new AssertionError("Bad type kind in subtyping test");
+            }
+        }
+    }
+
+    enum ParameterType {
+        INVARIANT("List<#1>"),
+        COVARIANT("List<? extends #1>"),
+        CONTRAVARIANT("List<? super #1>"),
+        BIVARIANT("List<?>");
+
+        String paramTypeStub;
+
+        ParameterType(String paramTypeStub) {
+            this.paramTypeStub = paramTypeStub;
+        }
+
+        String instantiate(ClassType ct) {
+            return paramTypeStub.replace("#1", ct.classStub);
+        }
+
+        static boolean contains(ParameterType pt1, ClassType ct1,
+                ParameterType pt2, ClassType ct2) {
+            switch (pt1) {
+                case INVARIANT: return (pt2 == INVARIANT && ct1 == ct2) ||
+                                           (pt2 == CONTRAVARIANT && ct1 == ct2 && ct1 == ClassType.OBJECT);
+                case COVARIANT: return ((pt2 == INVARIANT || pt2 == COVARIANT) &&
+                                            ct2.subtypeOf(ct1)) ||
+                                            (ct1 == ClassType.OBJECT);
+                case CONTRAVARIANT: return (pt2 == INVARIANT || pt2 == CONTRAVARIANT) &&
+                                            ct1.subtypeOf(ct2);
+                case BIVARIANT: return true;
+                default: throw new AssertionError("Bad type kind in containment test");
+            }
+        }
+    }
+
+    static class JavaSource extends SimpleJavaFileObject {
+
+        final static String sourceStub =
+                        "import java.util.List;\n" +
+                        "@interface ToCheck {}\n" +
+                        "class Test {\n" +
+                        "   @ToCheck void test(#A a, #B b) {}\n" +
+                        "}\n";
+
+        String source;
+
+        public JavaSource(String typeA, String typeB) {
+            super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
+            source = sourceStub.replace("#A", typeA).replace("#B", typeB);
+        }
+
+        @Override
+        public CharSequence getCharContent(boolean ignoreEncodingErrors) {
+            return source;
+        }
+    }
+
+    public static void main(String... args) throws Exception {
+        for (ClassType ctA : ClassType.values()) {
+            for (ParameterType ptA : ParameterType.values()) {
+                for (ClassType ctB : ClassType.values()) {
+                    for (ParameterType ptB : ParameterType.values()) {
+                        compileAndCheck(ptA, ctA, ptB, ctB);
+                    }
+                }
+            }
+        }
+    }
+
+    static void compileAndCheck(ParameterType ptA, ClassType ctA, ParameterType ptB, ClassType ctB) throws Exception {
+        JavaSource source = new JavaSource(ptA.instantiate(ctA), ptB.instantiate(ctB));
+        final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
+        JavacTask ct = (JavacTask)tool.getTask(null, null, null,
+                null, null, Arrays.asList(source));
+        ct.setProcessors(Arrays.asList(new ContainTypesTester(ParameterType.contains(ptA, ctA, ptB, ctB), source)));
+        System.err.println("A = " + ptA +" / " + ptA.instantiate(ctA));
+        System.err.println("B = " + ptB +" / " + ptB.instantiate(ctB));
+        System.err.println("Source = " + source.source);
+        ct.analyze();
+    }
+
+    @SupportedSourceVersion(SourceVersion.RELEASE_7)
+    static class ContainTypesTester extends AbstractProcessor {
+
+        boolean expected;
+        JavaSource source;
+
+        ContainTypesTester(boolean expected, JavaSource source) {
+            this.expected = expected;
+            this.source = source;
+        }
+
+        @Override
+        public Set<String> getSupportedAnnotationTypes() {
+            Set<String> supportedAnnos = new HashSet();
+            supportedAnnos.add("*");
+            return supportedAnnos;
+        }
+
+        private void error(String msg) {
+            System.err.println(source.source);
+            throw new AssertionError(msg);
+        }
+
+        @Override
+        public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
+            if (roundEnv.getRootElements().size() == 0) {
+                return true;
+            }
+            if (annotations.isEmpty() || annotations.size() > 1) {
+                error("no anno found/wrong number of annotations found: " + annotations.size());
+            }
+            TypeElement anno = (TypeElement)annotations.toArray()[0];
+            Set<? extends Element> annoElems = roundEnv.getElementsAnnotatedWith(anno);
+            if (annoElems.isEmpty() || annoElems.size() > 1) {
+                error("no annotated element found/wrong number of annotated elements found: " + annoElems.size());
+            }
+            Element annoElement = (Element)annoElems.toArray()[0];
+            if (!(annoElement instanceof ExecutableElement)) {
+                error("annotated element must be a method");
+            }
+            ExecutableElement method = (ExecutableElement)annoElement;
+            if (method.getParameters().size() != 2) {
+                error("annotated method must have 2 arguments");
+            }
+            DeclaredType d1 = (DeclaredType)method.getParameters().get(0).asType();
+            DeclaredType d2 = (DeclaredType)method.getParameters().get(1).asType();
+            if (d1.getTypeArguments().size() != 1 ||
+                    d1.getTypeArguments().size() != 1) {
+                error("parameter type must be generic in one type-variable");
+            }
+            TypeMirror t1 = d1.getTypeArguments().get(0);
+            TypeMirror t2 = d2.getTypeArguments().get(0);
+
+            if (processingEnv.getTypeUtils().contains(t1, t2) != expected) {
+                error("bad type containment result\n" +
+                        "t1 : " + t1 +"\n" +
+                        "t2 : " + t2 +"\n" +
+                        "expected answer : " + expected +"\n");
+            }
+            return true;
+        }
+    }
+}