Test for window inference. Fixes #10080

src/data.js

@@ -191,8 +191,8 @@ jQuery.extend({
 		// Browsers that fail expando deletion also refuse to delete expandos on
 		// the window, but it will allow it on all other JS objects; other browsers
 		// don't care
-		// Ensure that this id actually exists in `cache` #10080
-		if ( cache[ id ] && ( jQuery.support.deleteExpando || cache != window ) ) {
+		// Ensure that `cache` is not a window object #10080
+		if ( jQuery.support.deleteExpando || !cache.setInterval ) {
 			delete cache[ id ];
 		} else {
 			cache[ id ] = null;

test/unit/data.js

@@ -582,3 +582,16 @@ test("jQuery.data supports interoperable removal of hyphenated/camelCase propert
 
 	});
 });
+
+// Test originally by Moschel
+test("Triggering the removeData should not throw exceptions. (#10080)", function() {
+	expect(1);
+	stop();
+	var frame = jQuery("#loadediframe");
+	jQuery(frame[0].contentWindow).bind("unload", function() {
+		ok(true, "called unload");
+		start();
+	});
+	// change the url to trigger unload
+	frame.attr("src", "data/iframe.html?param=true");
+});