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<TITLE>3.1-M1: java.lang.VerifyError: Shadow Fact problem?</TITLE>
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<P><FONT SIZE=2 FACE="Arial">Hi,</FONT>
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<P><FONT SIZE=2 FACE="Arial">It never rains it pours!</FONT>
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<P><FONT SIZE=2 FACE="Arial">Given a very simple rule:-</FONT>
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<P><FONT SIZE=2 FACE="Courier New">package drools.debug</FONT>
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<P><FONT SIZE=2 FACE="Courier New">rule "Test1"</FONT>
<BR><FONT SIZE=2 FACE="Courier New">when</FONT>
<BR> <FONT SIZE=2 FACE="Courier New">$m : Machine ( )</FONT>
<BR><FONT SIZE=2 FACE="Courier New">then</FONT>
<BR> <FONT SIZE=2 FACE="Courier New">System.out.println("</FONT><FONT SIZE=2 FACE="Courier New">--> DEBUG!"</FONT><FONT SIZE=2 FACE="Courier New">);</FONT>
<BR><FONT SIZE=2 FACE="Courier New">end</FONT>
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<P><FONT SIZE=2 FACE="Arial">Throws a very unfriendly error:-</FONT>
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<P><FONT SIZE=2 FACE="Courier New">Exception in thread "main" java.lang.VerifyError: (class: drools/debug/MachineShadowProxy, method: setProperty signature: (Ljava/lang/String;JLjava/lang/String;)V) Register 3 contains wrong type</FONT></P>
<P> <FONT SIZE=2 FACE="Courier New">at java.lang.Class.getDeclaredConstructors0(Native Method)</FONT>
<BR> <FONT SIZE=2 FACE="Courier New">at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)</FONT>
<BR> <FONT SIZE=2 FACE="Courier New">at java.lang.Class.getConstructor0(Unknown Source)</FONT>
<BR> <FONT SIZE=2 FACE="Courier New">at java.lang.Class.getConstructor(Unknown Source)</FONT>
<BR> <FONT SIZE=2 FACE="Courier New">at org.drools.base.ClassObjectType.getShadow(ClassObjectType.java:123)</FONT>
<BR> <FONT SIZE=2 FACE="Courier New">at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:148)</FONT>
<BR> <FONT SIZE=2 FACE="Courier New">at org.drools.reteoo.Rete.assertObject(Rete.java:121)</FONT>
<BR> <FONT SIZE=2 FACE="Courier New">at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:196)</FONT>
<BR> <FONT SIZE=2 FACE="Courier New">at org.drools.reteoo.ReteooWorkingMemory.doAssertObject(ReteooWorkingMemory.java:68)</FONT>
<BR> <FONT SIZE=2 FACE="Courier New">at org.drools.common.AbstractWorkingMemory.assertObject(AbstractWorkingMemory.java:724)</FONT>
<BR> <FONT SIZE=2 FACE="Courier New">at org.drools.common.AbstractWorkingMemory.assertObject(AbstractWorkingMemory.java:543)</FONT>
<BR> <FONT SIZE=2 FACE="Courier New">at drools.debug.Setup.main(Setup.java:42)</FONT>
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<P><FONT SIZE=2 FACE="Arial">The Machine Class does extend another that has assessors for a Class that has lots and lots of constructors…</FONT>
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<P><FONT SIZE=2 FACE="Arial">Complete, self contained JAR, file available on request (a new JIRA?)</FONT>
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<P><FONT SIZE=2 FACE="Arial">Thanks,</FONT>
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<P><FONT SIZE=2 FACE="Arial">Mike</FONT>
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