8160928: javac incorrectly copies over interior type annotations to bridge method

Reviewed-by: vromero, mcimadamore
Contributed-by: NEvgeny Mandrikov <mandrikov@gmail.com>

src/share/classes/com/sun/tools/javac/code/SymbolMetadata.java

@@ -31,10 +31,13 @@ import javax.tools.JavaFileObject;
 
 import com.sun.tools.javac.comp.Annotate;
 import com.sun.tools.javac.comp.AttrContext;
+import com.sun.tools.javac.code.Attribute.TypeCompound;
+import com.sun.tools.javac.code.Kinds;
 import com.sun.tools.javac.comp.Env;
 import com.sun.tools.javac.util.*;
 import com.sun.tools.javac.util.Assert;
 import com.sun.tools.javac.util.List;
+import com.sun.tools.javac.util.ListBuffer;
 import com.sun.tools.javac.util.Log;
 import com.sun.tools.javac.util.Pair;
 import static com.sun.tools.javac.code.Kinds.PCK;
@@ -152,9 +155,22 @@ public class SymbolMetadata {
             throw new NullPointerException();
         }
         setDeclarationAttributes(other.getDeclarationAttributes());
-        setTypeAttributes(other.getTypeAttributes());
-        setInitTypeAttributes(other.getInitTypeAttributes());
-        setClassInitTypeAttributes(other.getClassInitTypeAttributes());
+        if ((sym.flags() & Flags.BRIDGE) != 0) {
+            Assert.check(other.sym.kind == Kinds.MTH);
+            ListBuffer<TypeCompound> typeAttributes = new ListBuffer<>();
+            for (TypeCompound tc : other.getTypeAttributes()) {
+                // Carry over only contractual type annotations: i.e nothing interior to method body.
+                if (!tc.position.type.isLocal())
+                    typeAttributes.append(tc);
+            }
+            setTypeAttributes(typeAttributes.toList());
+        } else {
+            setTypeAttributes(other.getTypeAttributes());
+        }
+        if (sym.kind == Kinds.TYP) {
+            setInitTypeAttributes(other.getInitTypeAttributes());
+            setClassInitTypeAttributes(other.getClassInitTypeAttributes());
+        }
     }
 
     public void setDeclarationAttributesWithCompletion(final Annotate.AnnotateRepeatedContext<Attribute.Compound> ctx) {

test/tools/javac/annotations/typeAnnotations/classfile/BridgeShouldHaveNoInteriorAnnotationsTest.java

+/*
+ * Copyright (c) 2018, 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 8160928
+ * @summary javac incorrectly copies over interior type annotations to bridge method
+ * @library /tools/javac/lib
+ * @build ToolBox
+ * @run compile -g BridgeShouldHaveNoInteriorAnnotationsTest.java
+ * @run main BridgeShouldHaveNoInteriorAnnotationsTest
+ */
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Target;
+import java.io.*;
+
+class Pair_8160928<T1, T2> {
+}
+
+public class BridgeShouldHaveNoInteriorAnnotationsTest implements java.util.Iterator<Pair_8160928<Object, Object>> {
+
+    @Override
+    public boolean hasNext() {
+        throw new RuntimeException();
+    }
+
+    @Override
+    public Pair_8160928<@NonNull Object, Object> next() {
+        Comparable<@NonNull Object> cble1 = (Comparable<@NonNull Object>) null;
+        return null;
+    }
+
+    @Override
+    public void remove() {
+        throw new RuntimeException();
+    }
+
+    @Target(ElementType.TYPE_USE)
+    public @interface NonNull {
+    }
+
+    static class OutputExpectedOnceHolder {
+        public String[] outputs = {
+            "0: #55(): CAST, offset=0, type_index=0, location=[TYPE_ARGUMENT(0)]",
+            "1: #55(): LOCAL_VARIABLE, {start_pc=5, length=2, index=1}, location=[TYPE_ARGUMENT(0)]",
+        };
+    }
+
+    static class OutputExpectedTwiceHolder {
+        public String[] outputs = {
+            "0: #55(): METHOD_RETURN, location=[TYPE_ARGUMENT(0)]",
+        };
+    }
+
+    public static void main(String[] args) throws Exception {
+        Path classPath = Paths.get(System.getProperty("test.classes"), "BridgeShouldHaveNoInteriorAnnotationsTest.class");
+        String javapOut = ToolBox.javap(new ToolBox.JavaToolArgs().setAllArgs("-v", "-p", classPath.toString()));
+
+        OutputExpectedOnceHolder holder = new OutputExpectedOnceHolder();
+        for (String s : holder.outputs) {
+            String newOutput = javapOut.replace(s, "");
+            if (((javapOut.length() - newOutput.length()) / s.length()) != 1)
+                throw new AssertionError("Interior annotations carried over to bridge ?");
+        }
+
+        OutputExpectedTwiceHolder holder2 = new OutputExpectedTwiceHolder();
+        for (String s : holder2.outputs) {
+            String newOutput = javapOut.replace(s, "");
+            if (((javapOut.length() - newOutput.length()) / s.length()) != 2)
+                throw new AssertionError("Exterior annotations not properly carried over to bridge");
+        }
+    }
+
+}