Clear canceled task node early (#16403)

gaearon · web-flow · commit 3ed289b3b128 · 2019-08-21T19:49:22.000+01:00
diff --git a/packages/react-reconciler/src/SchedulerWithReactIntegration.js b/packages/react-reconciler/src/SchedulerWithReactIntegration.js
@@ -160,7 +160,9 @@ export function cancelCallback(callbackNode: mixed) {
 
 export function flushSyncCallbackQueue() {
   if (immediateQueueCallbackNode !== null) {
-    Scheduler_cancelCallback(immediateQueueCallbackNode);
+    const node = immediateQueueCallbackNode;
+    immediateQueueCallbackNode = null;
+    Scheduler_cancelCallback(node);
   }
   flushSyncCallbackQueueImpl();
 }

Original file line number	Diff line number	Diff line change
`@@ -160,7 +160,9 @@ export function cancelCallback(callbackNode: mixed) {`
`160`	`160`
`161`	`161`	`export function flushSyncCallbackQueue() {`
`162`	`162`	`if (immediateQueueCallbackNode !== null) {`
`163`		`- Scheduler_cancelCallback(immediateQueueCallbackNode);`
	`163`	`+ const node = immediateQueueCallbackNode;`
	`164`	`+ immediateQueueCallbackNode = null;`
	`165`	`+ Scheduler_cancelCallback(node);`
`164`	`166`	`}`
`165`	`167`	`flushSyncCallbackQueueImpl();`
`166`	`168`	`}`