[Bug java/16284] New: GCJ incorrectly reports forbidden 'this' reference error

[stepan at srnet dot cz]

Used GCJ is from Slackware 10.0, version 3.4.0 (fails also with 3.3.4 from the
same distribution).

Test case:

public class Test {

  public Test() {
    super();
    new TestThread();
  }

  private class TestThread extends Thread {

    public TestThread() {
      super(a());
    }

  }

  public String a() {
    return "XXX";
  }

}

GCJ reports:

Test.java: In class `Test$TestThread':
Test.java: In constructor `(Test)':
Test.java:12: error: Can't reference `this' before the superclass constructor
has been called.
         super(a());
               ^
1 error

That is not correct because there is no use of 'this' when calling Test.a, only
silent argument of type Test is (should) used. Sun's Java 1.4.2 compiler
produces (disassembled with javap):

public Test$TestThread(Test);
  Code:
   0:   aload_0
   1:   aload_1
   2:   invokevirtual   #1; //Method Test.a:()Ljava/lang/String;
   5:   invokespecial   #2; //Method java/lang/Thread."<init>":(Ljava/lang/String;)V
   8:   aload_0
   9:   aload_1
   10:  putfield        #3; //Field this$0:LTest;
   13:  return

}

-- 
           Summary: GCJ incorrectly reports forbidden 'this' reference error
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: java
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: stepan at srnet dot cz
                CC: gcc-bugs at gcc dot gnu dot org,java-prs at gcc dot gnu
                    dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16284