Description Stefan Matthias Aust 2005-01-08 19:17:26 EST

Exception:

java.lang.VerifyError: (class: A, method: e signature: ()Ljava/lang/Object;)
Wrong return type in function

Testcase:

public class A {
 Object e() {
  return "".compareTo("") > 0;
 }
 public static void main(String[] args) {
  System.out.println(new A().e());
 }
}

Bytecode:

java.lang.Object e();
  Code:
   0:   ldc     #17; //String
   2:   ldc     #17; //String
   4:   invokevirtual   #23; //Method
java/lang/String.compareTo:(Ljava/lang/String;)I
   7:   ifle    12
   10:  iconst_1
   11:  ireturn
   12:  iconst_0
   13:  invokestatic    #29; //Method
java/lang/Boolean.valueOf:(Z)Ljava/lang/Boolean;
   16:  areturn

The "ireturn" at position 11 is obviously wrong. A "goto 13" should be created
(as javac does).  A workaround is to help the compiler by using a redundant cast:

 return (Boolean) (... > 0);