javac produces unverifiable classfile compiling conditional operator

Name: poR10007 Date: 07/23/2001



Javac (jdk1.4.0beta-b72) produces unverifiable code compiling the following
tests:

--Test1.java------------------------------------------------------
public class Test1 {
    public static void main (String[] args) {
boolean b = true, c = false;
if ((b || true) ? c : !c) ;
    }
}
------------------------------------------------------------------

--Test2.java------------------------------------------------------
public class Test2 {
    public static void main (String[] args) {
boolean b = true, c = false;
if ((c && false) ? b : b) ;
    }
}
------------------------------------------------------------------

--Execution log---------------------------------------------------
$ java -version
java version "1.4.0-beta_refresh"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta_refresh-b72)
Java HotSpot(TM) Client VM (build 1.4.0-beta_refresh-b72, mixed mode)
$ javac -d . Test1.java Test2.java; echo $?
0
$ java Test1; echo $?
Exception in thread "main" java.lang.VerifyError: (class: Test1, method: main signature: ([Ljava/lang/String;)V) Inconsistent stack
height 0 != 1
1
$ java Test2; echo $?
Exception in thread "main" java.lang.VerifyError: (class: Test2, method: main signature: ([Ljava/lang/String;)V) Inconsistent stack
height 0 != 1
1
$
------------------------------------------------------------------

The failure is reproducible since jdk1.4.0beta-b51.

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