Computed observables used for bindings (identified by having a dispos…

…eWhenNodeIsRemoved option) won't respond to "dirty" events. This prevents conflicting bindings from causing recursive updates.

spec/asyncBindingBehaviors.js

@@ -126,12 +126,13 @@ describe("Deferred bindings", function() {
         expect(testNode.childNodes[0].childNodes[targetIndex]).not.toBe(itemNode);    // node was create anew so it's not the same
     });
 
-    it('Should throw an exception for value binding on multiple select boxes', function() {
+    it('Should not throw an exception for value binding on multiple select boxes', function() {
         testNode.innerHTML = "<select data-bind=\"options: ['abc','def','ghi'], value: x\"></select><select data-bind=\"options: ['xyz','uvw'], value: x\"></select>";
         var observable = ko.observable();
-        ko.applyBindings({ x: observable }, testNode);
         expect(function() {
+            ko.applyBindings({ x: observable }, testNode);
             jasmine.Clock.tick(1);
-        }).toThrowContaining('Too much recursion');
+        }).not.toThrow();
+        expect(observable()).not.toBeUndefined();       // The spec doesn't specify which of the two possible values is actually set
     });
 });

spec/defaultBindings/valueBehaviors.js

@@ -510,6 +510,15 @@ describe('Binding: Value', function() {
             expect(dropdown.selectedIndex).toEqual(2);
         });
 
+        it('Should not throw an exception for value binding on multiple select boxes', function() {
+            testNode.innerHTML = "<select data-bind=\"options: ['abc','def','ghi'], value: x\"></select><select data-bind=\"options: ['xyz','uvw'], value: x\"></select>";
+            var observable = ko.observable();
+            expect(function() {
+                ko.applyBindings({ x: observable }, testNode);
+            }).not.toThrow();
+            expect(observable()).not.toBeUndefined();       // The spec doesn't specify which of the two possible values is actually set
+        });
+
         describe('Using valueAllowUnset option', function () {
             it('Should display the caption when the model value changes to undefined, null, or \"\" when using \'options\' binding', function() {
                 var observable = ko.observable('B');

src/subscribables/dependentObservable.js

@@ -58,7 +58,7 @@ ko.computed = ko.dependentObservable = function (evaluatorFunctionOrOptions, eva
     }
 
     function subscribeToDependency(target) {
-        if (target._deferUpdates) {
+        if (target._deferUpdates && !disposeWhenNodeIsRemoved) {
             var dirtySub = target.subscribe(markDirty, null, 'dirty'),
                 changeSub = target.subscribe(respondToChange);
             return {