Fix throwing null errors after disposal in release mode (#305)

fix #256
EdsonBueno · Feb 19, 2024 · 0c4e3e5 · 0c4e3e5
1 parent e1a826d
commit 0c4e3e5
Showing 1 changed file with 5 additions and 5 deletions.
diff --git a/lib/src/core/paging_controller.dart b/lib/src/core/paging_controller.dart
@@ -148,7 +148,7 @@ class PagingController<PageKeyType, ItemType>
   /// Listeners can be removed with [removeStatusListener].
   void addStatusListener(PagingStatusListener listener) {
     assert(_debugAssertNotDisposed());
-    _statusListeners!.add(listener);
+    _statusListeners?.add(listener);
   }
 
   /// Stops calling the listener every time the status of the pagination
@@ -157,7 +157,7 @@ class PagingController<PageKeyType, ItemType>
   /// Listeners can be added with [addStatusListener].
   void removeStatusListener(PagingStatusListener listener) {
     assert(_debugAssertNotDisposed());
-    _statusListeners!.remove(listener);
+    _statusListeners?.remove(listener);
   }
 
   /// Calls all the status listeners.
@@ -167,7 +167,7 @@ class PagingController<PageKeyType, ItemType>
   void notifyStatusListeners(PagingStatus status) {
     assert(_debugAssertNotDisposed());
 
-    if (_statusListeners!.isEmpty) {
+    if (_statusListeners?.isEmpty ?? true) {
       return;
     }
 
@@ -184,15 +184,15 @@ class PagingController<PageKeyType, ItemType>
   /// Listeners can be removed with [removePageRequestListener].
   void addPageRequestListener(PageRequestListener<PageKeyType> listener) {
     assert(_debugAssertNotDisposed());
-    _pageRequestListeners!.add(listener);
+    _pageRequestListeners?.add(listener);
   }
 
   /// Stops calling the listener every time new items are needed.
   ///
   /// Listeners can be added with [addPageRequestListener].
   void removePageRequestListener(PageRequestListener<PageKeyType> listener) {
     assert(_debugAssertNotDisposed());
-    _pageRequestListeners!.remove(listener);
+    _pageRequestListeners?.remove(listener);
   }
 
   /// Calls all the page request listeners.