Index: drools-compiler/src/test/java/org/drools/integrationtests/IntegrationCases.java
===================================================================
--- drools-compiler/src/test/java/org/drools/integrationtests/IntegrationCases.java	(revision 7289)
+++ drools-compiler/src/test/java/org/drools/integrationtests/IntegrationCases.java	(working copy)
@@ -2763,6 +2763,91 @@
                       cheeseList.size() );
     }
 
+    public void testDoubleQueryWithExists() throws Exception {
+        final PackageBuilder builder = new PackageBuilder();
+        builder.addPackageFromDrl( new InputStreamReader( getClass().getResourceAsStream( "test_DoubleQueryWithExists.drl" ) ) );
+        final Package pkg = builder.getPackage();
+
+        final RuleBase ruleBase = getRuleBase();
+        ruleBase.addPackage( pkg );
+        final WorkingMemory workingMemory = ruleBase.newWorkingMemory();
+
+        Person p1 = new Person( "p1",
+                                "stilton",
+                                20 );
+        p1.setStatus( "europe" );
+        FactHandle c1FactHandle = workingMemory.assertObject( p1 );
+        Person p2 = new Person( "p2",
+                                "stilton",
+                                30 );
+        p2.setStatus( "europe" );
+        FactHandle c2FactHandle = workingMemory.assertObject( p2 );
+        Person p3 = new Person( "p3",
+                                "stilton",
+                                40 );
+        p3.setStatus( "europe" );
+        FactHandle c3FactHandle = workingMemory.assertObject( p3 );
+        workingMemory.fireAllRules();
+
+        QueryResults queryResults = workingMemory.getQueryResults("2 persons with the same status");
+        assertEquals( 2,
+                      queryResults.size() );
+
+        // europe=[ 1, 2 ], america=[ 3 ]
+        p3.setStatus( "america" );
+        workingMemory.modifyObject( c3FactHandle,
+                                    p3 );
+        workingMemory.fireAllRules();
+        queryResults = workingMemory.getQueryResults("2 persons with the same status");
+        assertEquals( 1,
+                      queryResults.size() );
+
+        // europe=[ 1 ], america=[ 2, 3 ]
+        p2.setStatus( "america" );
+        workingMemory.modifyObject( c2FactHandle,
+                                    p2 );
+        workingMemory.fireAllRules();
+        queryResults = workingMemory.getQueryResults("2 persons with the same status");
+        assertEquals( 1,
+                      queryResults.size() );
+
+        // europe=[ ], america=[ 1, 2, 3 ]
+        p1.setStatus( "america" );
+        workingMemory.modifyObject( c1FactHandle,
+                                    p1 );
+        workingMemory.fireAllRules();
+        queryResults = workingMemory.getQueryResults("2 persons with the same status");
+        assertEquals( 2,
+                      queryResults.size() );
+
+        // europe=[ 2 ], america=[ 1, 3 ]
+        p2.setStatus( "europe" );
+        workingMemory.modifyObject( c2FactHandle,
+                                    p2 );
+        workingMemory.fireAllRules();
+        queryResults = workingMemory.getQueryResults("2 persons with the same status");
+        assertEquals( 1,
+                      queryResults.size() );
+
+        // europe=[ 1, 2 ], america=[ 3 ]
+        p1.setStatus( "europe" );
+        workingMemory.modifyObject( c1FactHandle,
+                                    p1 );
+        workingMemory.fireAllRules();
+        queryResults = workingMemory.getQueryResults("2 persons with the same status");
+        assertEquals( 1,
+                      queryResults.size() );
+
+        // europe=[ 1, 2, 3 ], america=[ ]
+        p3.setStatus( "europe" );
+        workingMemory.modifyObject( c3FactHandle,
+                                    p3 );
+        workingMemory.fireAllRules();
+        queryResults = workingMemory.getQueryResults("2 persons with the same status");
+        assertEquals( 2,
+                      queryResults.size() );
+    }
+
     public void testLLR() throws Exception {
 
         //read in the source
Index: drools-compiler/src/test/resources/org/drools/integrationtests/test_DoubleQueryWithExists.drl
===================================================================
--- drools-compiler/src/test/resources/org/drools/integrationtests/test_DoubleQueryWithExists.drl	(revision 0)
+++ drools-compiler/src/test/resources/org/drools/integrationtests/test_DoubleQueryWithExists.drl	(revision 0)
@@ -0,0 +1,6 @@
+package org.drools
+
+query "2 persons with the same status"
+		p : Person($status : status, $age : age)
+		exists Person(status == $status, age > $age);
+end
\ No newline at end of file