Name: akC45999 Date: 07/22/97



The section "4.4.2 CONSTANT_Fieldref, CONSTANT_Methodref,
CONSTANT_InterfaceMethodref" of JVM spec says about class_index
item:

"The class_index item of a CONSTANT_Fieldref_info ...
structure must be a class type, not an interface type".

But sun's JDK permits a CONSTANT_Fieldref_info structure
to refer to an interface type. See example:

/*-------------------------------- fieldref.java */
interface fieldref_i {
  String s = new String("xxx");
}

public class fieldref implements fieldref_i {

  public static void main(String argv[]) {
fieldref_i obj=new fieldref();
System.out.println(obj.s);
  }

}
/*----------------------------- */
Disassembled class contains instruction:

const #2 = class #29; // fieldref_i
const #10 = Field #2.#14; // fieldref_i.s:"Ljava/lang/String;"
const #14 = NameAndType #36:#24; // s:"Ljava/lang/String;"
const #24 = Asciz "Ljava/lang/String;";
const #29 = Asciz "fieldref_i";
const #36 = Asciz "s";

getstatic #10; // Field fieldref_i.s:"Ljava/lang/String;";
/*-------------------------------*/

I cannot see other way to compile the fieldref.java source.
So I believe that the error is in the JVM spec rather than in the JVM
implementation.
See also bug 4054281 which is closed because the applied test was incorrect.

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