Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8138667

java.lang.IllegalAccessError: tried to access method (for a protected method)

    Details

    • Subcomponent:
    • Resolved In Build:
      b137
    • Verification:
      Verified

      Description

      FULL PRODUCT VERSION :
      Java(TM) SE Runtime Environment (build 1.8.0_60-b27)
      Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)


      FULL OS VERSION :
      Mac OS X 10.9.5
      Windows 7

      A DESCRIPTION OF THE PROBLEM :
      A lambda nested in an anonymous class cannot call a protected method inherited by the class surrounding the anonymous class.

      The compiler accepts this code but running it produces a java.lang.IllegalAccessError.

      THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: Yes

      THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Yes

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Compile the test classes and run class bbb.Test

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      Expected:

      The method aaa.AbstractClass#myDo() is called and prints "It works" to System.out

      Actual:

      A BootstrapMethodError is thrown caused by an IllegalAccessError
      ERROR MESSAGES/STACK TRACES THAT OCCUR :
      Exception in thread "main" java.lang.BootstrapMethodError: java.lang.IllegalAccessError: tried to access method aaa.AbstractClass.myDo()V from class bbb.Test$1
      at bbb.Test$1.call(Test.java:22)
      at bbb.Test.doTest(Test.java:26)
      at bbb.Test.main(Test.java:31)
      Caused by: java.lang.IllegalAccessError: tried to access method aaa.AbstractClass.myDo()V from class bbb.Test$1
      at java.lang.invoke.MethodHandleNatives.resolve(Native Method)
      at java.lang.invoke.MemberName$Factory.resolve(MemberName.java:962)
      at java.lang.invoke.MemberName$Factory.resolveOrFail(MemberName.java:987)
      at java.lang.invoke.MethodHandles$Lookup.resolveOrFail(MethodHandles.java:1390)
      at java.lang.invoke.MethodHandles$Lookup.linkMethodHandleConstant(MethodHandles.java:1746)
      at java.lang.invoke.MethodHandleNatives.linkMethodHandleConstant(MethodHandleNatives.java:477)
      ... 3 more


      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      package aaa;

      /**
       * <hr>
       * <p>User: mathias</p>
       * <p>Date: 22.09.15</p>
       * <p>Time: 15:37</p>
       */
      public abstract class AbstractClass {
          protected final void myDo() {
              System.err.println("It works!");
          }
      }
      ----------------------------------------------------
      package bbb;

      import aaa.AbstractClass;

      import java.util.concurrent.Callable;

      /**
       * <hr>
       * <p>User: mathias</p>
       * <p>Date: 22.09.15</p>
       * <p>Time: 15:39</p>
       */
      public final class Test extends AbstractClass {
          public Test() {

          }

          public void doTest() throws Exception {
              new Callable<Void>() {
                  @Override
                  public Void call() throws Exception {
                      final Runnable r = Test.this::myDo;
                      r.run();
                      return null;
                  }
              }.call();
          }

          public static void main(String[] args) throws Exception {
              final Test test = new Test();
              test.doTest();
          }
      }

      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      1. Replace the anonymous class with a lambda expression
      2. Replace the lamba expression with an anonymous class

      BUT: Both workarounds do not address the initial problem, that the unmodified code is accepted by the compiler but rejected at runtime!

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                sadayapalam Srikanth Adayapalam
                Reporter:
                webbuggrp Webbug Group
              • Votes:
                0 Vote for this issue
                Watchers:
                6 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: