Name: tb29552 Date: 11/15/2002


FULL PRODUCT VERSION :
java version "1.4.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_01-b01)
Java HotSpot(TM) Client VM (build 1.4.1_01-b01, mixed mode)

FULL OPERATING SYSTEM VERSION : glibc-2.2.5-164, kernel
2.4.19-4GB, SuSE Linux Professional 8.1
 
 
ADDITIONAL OPERATING SYSTEMS :


A DESCRIPTION OF THE PROBLEM :
The compiler crashes during compilation of an abstract
classes with an abstract constructor. Even if the code is
not correct, the compiler should not crash.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Compile the file Expression.java
2.
3.

EXPECTED VERSUS ACTUAL BEHAVIOR :
I expected a compiler error, but not a crash.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Expression.java:4: modifier abstract not allowed here
    public abstract Expression(Expression exp) {
                    ^
An exception has occurred in the compiler (1.4.1_01). Please file a bug at the
Java Developer Connection (http://java.sun.com/cgi-bin/bugreport.cgi) after
checking the Bug Parade for duplicates. Include your program and the following
diagnostic in your report. Thank you.
java.lang.NullPointerException
        at
com.sun.tools.javac.v8.tree.TreeInfo.isSyntheticInit(TreeInfo.java:112)
        at
com.sun.tools.javac.v8.tree.TreeInfo.firstConstructorCall(TreeInfo.java:176)
        at
com.sun.tools.javac.v8.comp.Check.checkCyclicConstructors(Check.java:944)
        at com.sun.tools.javac.v8.comp.Attr.attribClassBody(Attr.java:1401)
        at com.sun.tools.javac.v8.comp.Attr.attribClass(Attr.java:1366)
        at com.sun.tools.javac.v8.comp.Attr.attribClass(Attr.java:1342)
        at com.sun.tools.javac.v8.JavaCompiler.compile(JavaCompiler.java:358)
        at com.sun.tools.javac.v8.Main.compile(Main.java:520)
        at com.sun.tools.javac.Main.compile(Main.java:36)
        at com.sun.tools.javac.Main.main(Main.java:27)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public abstract class Expression {
    private Expression exp;
 
    public abstract Expression(Expression exp) {
        this.exp = exp; // compiler does not crash without this line
    }
}
  

---------- END SOURCE ----------
(Review ID: 167106)
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