Name: sg39081 Date: 08/27/97


with the input file:


package js.operators;

import antlr.collections.AST;
import js.lang.*;

public class BitwiseAndAssignCode extends BitwiseAndAssignCode {

    public BitwiseAndAssignCode(ExecutionStack execution_stack) {
        super("&=", execution_stack);
    }

    //////////////////////////////////////////////////////////////////////
    // Section 11.13.2
    //////////////////////////////////////////////////////////////////////
    protected Object apply2(int result5, int result6) {
        return new Integer(result5 & result6);
    }
}
// note the mistake: subclassing itself


edinburgh[1626] /ufs1/emberson/work/js/operators > make
/usr/local/java/jdk1.2/bin/javac -g -d ../classes -classpath
../classes:./:./../..:/usr/local/java/jdk1.2/lib/classes.zip:/usr/local/java/JFC/swing-0.3/swing.jar:/usr/local/java/JFC/swing-0.3/rose.jar:/usr/local/java/jdk1.2/lib/classes.zip:.:./..:./../../.:./../../../.:./../../../../.:/ufs1/emberson/work/:/usr/local/java/antlr2.11
BitwiseAndAssignCode.java
java.lang.StackOverflowError
        at sun.tools.javac.SourceClass.basicCheck(SourceClass.java:907)
        at sun.tools.java.ClassDeclaration.getClassDefinition(ClassDeclaration.java:121)
        at sun.tools.java.ClassDefinition.getInnerClass(ClassDefinition.java:675)
        at sun.tools.java.ClassDefinition.getInnerClass(ClassDefinition.java:675)

many many more .....

sun.tools.java.ClassDefinition.getInnerClass(ClassDefinition.java:675)
        at sun.tools.java.ClassDefinition.getInnerClass(ClassDefinition.java:675)
        at sun.tools.java.ClassDefinition.getInnerClass(ClassDefinition.java:675)
        at sun.tools.java.ClassDefinition.getInnerClass(ClassDefinition.java:675)
        at sun.tools.java.ClassDefinition.getInnerClass(ClassDefinition.java:675)
        at sun.tools.java.ClassDefinition.getInnerClass(ClassDefinition.java:675)
        at sun.tools.java.ClassDefinition.getInnerClass(ClassDefinition.java:675)
        at sun.tools.java.ClassDefinition.getInnerClass(ClassDefinition.java:675)
        at sun.tools.java.ClassDefinition.resolveName(ClassDefinition.java:863)
        at sun.tools.java.Environment.resolveNames(Environment.java:222)
        at sun.tools.java.Environment.resolveNames(Environment.java:241)
        at sun.tools.javac.SourceField.resolveTypeStructure(SourceField.java:228)
        at sun.tools.javac.SourceClass.resolveTypeStructure(SourceClass.java:976)
        at sun.tools.javac.SourceClass.basicCheck(SourceClass.java:920)
        at sun.tools.java.ClassDeclaration.getClassDefinition(ClassDeclaration.java:121)
        at sun.tools.javac.Main.compile(Main.java:274)
        at sun.tools.javac.Main.main(Main.java:467)
error: An error has occurred in the compiler; please file a bug report
(http://java.sun.com/cgi-bin/bugreport.cgi).
1 error
make: *** [../classes/js/operators/BitwiseAndAssignCode.class] Error 1


Whats funny is that I could not duplicate this with a simple
test case like:

package java.test;

public class Incest extends Incest {
    public Incest() {
    }
}

Here the compiler is ok giving one:

Incest.java:4: Cyclic class inheritance.
public class Incest extends Incest {
                            ^
1 error
======================================================================