Added a test case.

core/src/main/java/hudson/matrix/DefaultMatrixExecutionStrategyImpl.java

@@ -68,6 +68,10 @@ public class DefaultMatrixExecutionStrategyImpl extends MatrixExecutionStrategy
         this(false,false,null,null,null);
     }
 
+    public boolean getHasTouchStoneCombinationFilter() {
+        return touchStoneCombinationFilter!=null;
+    }
+
     /**
      * If true, {@link MatrixRun}s are run sequentially, instead of running in parallel.
      *

core/src/main/resources/hudson/matrix/DefaultMatrixExecutionStrategyImpl/config.groovy

@@ -11,8 +11,7 @@ f.optionalBlock (field:"runSequentially", title:_("Run each configuration sequen
     }
 }
 
-f.optionalBlock (field:"hasTouchStoneCombinationFilter", title:_("Execute touchstone builds first"),
-        inline:true, checked:my.touchStoneCombinationFilter!=null) {
+f.optionalBlock (field:"hasTouchStoneCombinationFilter", title:_("Execute touchstone builds first"), inline:true) {
     // TODO: help="/help/matrix/touchstone.html">
     // TODO: move l10n from MatrixProject/configEntries.jelly
 

test/src/test/groovy/hudson/matrix/MatrixProjectTest.groovy

@@ -229,6 +229,17 @@ public class MatrixProjectTest extends HudsonTestCase {
             assertEquals(oi.name,ni.name);
             assertEquals(oi.values,ni.values);
         }
+
+
+        def before = new DefaultMatrixExecutionStrategyImpl(true, "foo", Result.UNSTABLE, null)
+        p.executionStrategy = before;
+        configRoundtrip(p);
+        assertEqualDataBoundBeans(p.executionStrategy,before);
+
+        before = new DefaultMatrixExecutionStrategyImpl(false, null, null, null)
+        p.executionStrategy = before;
+        configRoundtrip(p);
+        assertEqualDataBoundBeans(p.executionStrategy,before);
     }
 
     public void testLabelAxes() {