Ensure captureOwnerStack returns null when no stack is available (facebook#32353)

Co-authored-by: Younes Henni <youneshenniwrites@gmail.com>

Author: eps1lon

packages/react-reconciler/src/ReactCurrentFiber.js

@@ -72,7 +72,7 @@ export function runWithFiberInDEV<A0, A1, A2, A3, A4, T>(
       }
       return callback(arg0, arg1, arg2, arg3, arg4);
     } finally {
-      current = previousFiber;
+      setCurrentFiber(previousFiber);
     }
   }
   // These errors should never make it into a build so we don't need to encode them in codes.json

packages/react-reconciler/src/__tests__/ReactOwnerStacks-test.js

@@ -62,4 +62,17 @@ describe('ReactOwnerStacks', () => {
       '\n    in Bar (at **)' + '\n    in Foo (at **)',
     );
   });
+
+  it('returns null outside of render', async () => {
+    // Awkward to gate since some builds will have `captureOwnerStack` return null in prod
+    if (__DEV__ && gate('enableOwnerStacks')) {
+      expect(React.captureOwnerStack()).toBe(null);
+
+      await act(() => {
+        ReactNoop.render(<div />);
+      });
+
+      expect(React.captureOwnerStack()).toBe(null);
+    }
+  });
 });