[ASRangeController] Ensure that even if the collection view layout is inconsistent, it is impossible for a visible item to not be in the display range.

AsyncDisplayKit/ASControlNode.h

@@ -120,11 +120,6 @@ typedef NS_OPTIONS(NSUInteger, ASControlState) {
  */
 - (void)sendActionsForControlEvents:(ASControlNodeEvent)controlEvents withEvent:(nullable UIEvent *)event;
 
-/**
- Class method to enable a visualization overlay of the tapable area on the ASControlNode. For app debugging purposes only.
- @param enable Specify YES to make this debug feature enabled when messaging the ASControlNode class.
- */
-+ (void)setEnableHitTestDebug:(BOOL)enable;
 @end
 
 NS_ASSUME_NONNULL_END

AsyncDisplayKit/ASDisplayNode.mm

@@ -2003,6 +2003,8 @@ void recursivelyTriggerDisplayForLayer(CALayer *layer, BOOL shouldBlock)
 
 - (void)setInterfaceState:(ASInterfaceState)newState
 {
+  // It should never be possible for a node to be visible but not be allowed / expected to display.
+  ASDisplayNodeAssertFalse(ASInterfaceStateIncludesVisible(newState) && !ASInterfaceStateIncludesDisplay(newState));
   ASInterfaceState oldState = ASInterfaceStateNone;
   {
     ASDN::MutexLocker l(_propertyLock);

AsyncDisplayKit/AsyncDisplayKit+Debug.h

@@ -6,9 +6,19 @@
 //  Copyright © 2016 Facebook. All rights reserved.
 //
 
-#import <Foundation/Foundation.h>
+#import "ASControlNode.h"
 #import "ASImageNode.h"
 
+@interface ASControlNode (Debugging)
+
+/**
+ Class method to enable a visualization overlay of the tapable area on the ASControlNode. For app debugging purposes only.
+ @param enable Specify YES to make this debug feature enabled when messaging the ASControlNode class.
+ */
++ (void)setEnableHitTestDebug:(BOOL)enable;
+
+@end
+
 @interface ASImageNode (Debugging)
 
 /**

AsyncDisplayKit/Details/ASRangeController.mm

@@ -238,6 +238,7 @@ static UIApplicationState __ApplicationState = UIApplicationStateActive;
   [self registerForNotificationsForInterfaceStateIfNeeded:selfInterfaceState];
   
 #if ASRangeControllerLoggingEnabled
+  ASDisplayNodeAssertTrue([visibleIndexPaths isSubsetOfSet:displayIndexPaths]);
   NSMutableArray<NSIndexPath *> *modifiedIndexPaths = (ASRangeControllerLoggingEnabled ? [NSMutableArray array] : nil);
 #endif
   
@@ -247,14 +248,15 @@ static UIApplicationState __ApplicationState = UIApplicationStateActive;
     ASInterfaceState interfaceState = ASInterfaceStateMeasureLayout;
     
     if (ASInterfaceStateIncludesVisible(selfInterfaceState)) {
-      if ([fetchDataIndexPaths containsObject:indexPath]) {
-        interfaceState |= ASInterfaceStateFetchData;
-      }
-      if ([displayIndexPaths containsObject:indexPath]) {
-        interfaceState |= ASInterfaceStateDisplay;
-      }
       if ([visibleIndexPaths containsObject:indexPath]) {
-        interfaceState |= ASInterfaceStateVisible;
+        interfaceState |= (ASInterfaceStateVisible | ASInterfaceStateDisplay | ASInterfaceStateFetchData);
+      } else {
+        if ([fetchDataIndexPaths containsObject:indexPath]) {
+          interfaceState |= ASInterfaceStateFetchData;
+        }
+        if ([displayIndexPaths containsObject:indexPath]) {
+          interfaceState |= ASInterfaceStateDisplay;
+        }
       }
     } else {
       // If selfInterfaceState isn't visible, then visibleIndexPaths represents what /will/ be immediately visible at the