Don't clear static flags in resetWorkInProgress

acdlite · acdlite · commit a6329b10508e · 2020-12-18T11:30:20.000-06:00
Fixes the regression test added in #20433
diff --git a/packages/react-reconciler/src/ReactFiber.new.js b/packages/react-reconciler/src/ReactFiber.new.js
@@ -365,7 +365,7 @@ export function resetWorkInProgress(workInProgress: Fiber, renderLanes: Lanes) {
 
   // Reset the effect flags but keep any Placement tags, since that's something
   // that child fiber is setting, not the reconciliation.
-  workInProgress.flags &= Placement;
+  workInProgress.flags &= StaticMask | Placement;
 
   // The effect list is no longer valid.
   workInProgress.nextEffect = null;
diff --git a/packages/react-reconciler/src/ReactFiber.old.js b/packages/react-reconciler/src/ReactFiber.old.js
@@ -365,7 +365,7 @@ export function resetWorkInProgress(workInProgress: Fiber, renderLanes: Lanes) {
 
   // Reset the effect flags but keep any Placement tags, since that's something
   // that child fiber is setting, not the reconciliation.
-  workInProgress.flags &= Placement;
+  workInProgress.flags &= StaticMask | Placement;
 
   // The effect list is no longer valid.
   workInProgress.nextEffect = null;
