I am experiencing a problem with ClassCompiler with some of my scripts
using either rhino 1.6 or 1.7
js.jar manifests...
rhino 1.6 from 11/18/2006
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.5
Created-By: 1.5.0_06-b05 (Sun Microsystems Inc.)
Main-Class: org.mozilla.javascript.tools.shell.Main
Class-Path: xbean.jar
rhino 1.7 from 8/19/2007
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.5
Created-By: 1.5.0_07-b03 (Sun Microsystems Inc.)
Main-Class: org.mozilla.javascript.tools.shell.Main
Class-Path: xbean.jar
the following contrived code example exhibits the problem producing a
java.lang.VerifyError when a new instance is created.
verifyError.js
var o = new Object;
o.setX = function (id) {
this.oid = id;
}
function setX(n) {
if (n == "" || n == null)
n = 0;
var s = new Object;
s.xyz = n;
if(s != null) {
o.setX(s.xyz);
}
}
setX('x');
all compilations using jdk1.6...
> java -version
java version "1.6.0_01-ea"
Java(TM) SE Runtime Environment (build 1.6.0_01-ea-b03)
Java HotSpot(TM) Server VM (build 1.6.0_01-ea-b03, mixed mode)
> java org.mozilla.javascript.tools.jsc.Main -nosource -O 9 -version 160
> verifyError.js
> java org.mozilla.javascript.tools.jsc.Main verifyError
Exception in thread "main" java.lang.VerifyError: (class: verifyError,
method: _c2 signature: (LverifyError;Lorg/mozilla/javascript/
Context;Lorg/mozilla/javascript/Scriptable;Lorg/mozilla/javascript/
Scriptable;Ljava/lang/Object;D[Ljava/lang/Object;)Ljava/lang/Object;)
Register 4 contains wrong type
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
at java.lang.Class.getConstructor0(Class.java:2699)
at java.lang.Class.newInstance0(Class.java:326)
at java.lang.Class.newInstance(Class.java:308)
changing version to 120 or 140 has no effect...
> java org.mozilla.javascript.tools.jsc.Main -nosource -O 9 -version 140
> verifyError.js
> java org.mozilla.javascript.tools.jsc.Main verifyError
Exception in thread "main" java.lang.VerifyError: (class: verifyError,
method: _c2 signature: (LverifyError;Lorg/mozilla/javascript/
Context;Lorg/mozilla/javascript/Scriptable;Lorg/mozilla/javascript/
Scriptable;Ljava/lang/Object;D[Ljava/lang/Object;)Ljava/lang/Object;)
Register 4 contains wrong type
changing optimization to 1 has no effect...
> java org.mozilla.javascript.tools.jsc.Main -nosource -O 1 -version 140
> verifyError.js
> java org.mozilla.javascript.tools.jsc.Main verifyError
Exception in thread "main" java.lang.VerifyError: (class: verifyError,
method: _c2 signature: (LverifyError;Lorg/mozilla/javascript/
Context;Lorg/mozilla/javascript/Scriptable;Lorg/mozilla/javascript/
Scriptable;Ljava/lang/Object;D[Ljava/lang/Object;)Ljava/lang/Object;)
Register 4 contains wrong type
changing optimization to -1 or zero works...
> java org.mozilla.javascript.tools.jsc.Main -nosource -O 0 -version 140
> verifyError.js
> java org.mozilla.javascript.tools.jsc.Main verifyError
no exception thrown.
oddly enough, certain minor code changes cure the problem. e.g.
comment out...
/*
if (n == "" || n == null)
n = 0;
*/
or comment out...
// o.setX(s.ID);
or change...
s.xyz = 1;
or...
change one of the function names so that they are different.
each of these trivial modifications cures the problem in all
compilation cases.
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