Notifications欄スクロール時にassert.jsでエラーが出る

[Neustrashimy]

alpha-0.1.2-35-ga4e8117
Windows 10 / Google Chrome 58.0.3029.110 (64-bit)

Notifications欄を一旦下へスクロールした後、最上部へスクロールすると発生します。
（発生しない時もあります。。。）

PrintLogger.js:53   InitializeApplicationUseCase(includes "LoadTokensUseCase")
PrintLogger.js:53   ReplaceDialogsUseCase
NotificationCenter.es6:49 addListener
NotificationCenter.es6:49 addListener
NotificationCenter.es6:49 addListener
PrintLogger.js:53   Store is changed
assert.js:195 Uncaught AssertionError {name: "AssertionError", actual: null, expected: true, operator: "==", message: "null == true"…}
fail @ assert.js:195
ok @ assert.js:215
loadMoreStatuses @ NotificationsColumn.es6:68
onTimelineScrolled @ PagingColumn.es6:299
ReactErrorUtils.invokeGuardedCallback @ ReactErrorUtils.js:69
executeDispatch @ EventPluginUtils.js:85
executeDispatchesInOrder @ EventPluginUtils.js:108
executeDispatchesAndRelease @ EventPluginHub.js:43
executeDispatchesAndReleaseTopLevel @ EventPluginHub.js:54
forEachAccumulated @ forEachAccumulated.js:24
processEventQueue @ EventPluginHub.js:257
runEventQueueInBatch @ ReactEventEmitterMixin.js:17
handleTopLevel @ ReactEventEmitterMixin.js:28
handleTopLevelImpl @ ReactEventListener.js:72
perform @ Transaction.js:140
batchedUpdates @ ReactDefaultBatchingStrategy.js:62
batchedUpdates @ ReactUpdates.js:97
dispatchEvent @ ReactEventListener.js:147

[Neustrashimy]

alpha-0.1.2-202-gdf69e35
Windows 10 / Google Chrome 58.0.3029.110 (64-bit)

わたしの環境での再現方法です。

1. 通知が一画面に収まる件数のとき
2. スクロールバーが出る程度までブラウザの高さを狭め
3. 通知欄を一旦下にスクロールした後、最上部までスクロールする

ほとんど同一ですが、念のためエラーログを添付いたします。

main.bundle.js:77850   InitializeApplicationUseCase(includes "LoadTokensUseCase")
PrintLogger.js:53   ReplaceDialogsUseCase
NotificationCenter.es6:51 addListener
NotificationCenter.es6:51 addListener
NotificationCenter.es6:51 addListener
NotificationCenter.es6:51 addListener
PrintLogger.js:53   Store is changed
PrintLogger.js:53   PushDialogUseCase
PrintLogger.js:53   Store is changed
PrintLogger.js:53   CloseDialogUseCase
PrintLogger.js:53   Store is changed
PrintLogger.js:53   ReplaceDialogsUseCase
PrintLogger.js:53   Store is changed
PrintLogger.js:53   ReplaceDialogsUseCase
PrintLogger.js:53   Store is changed
PrintLogger.js:53   ReplaceDialogsUseCase
PrintLogger.js:53   Store is changed
PrintLogger.js:53   ReplaceDialogsUseCase
PrintLogger.js:53   Store is changed
PrintLogger.js:53   PushDialogUseCase
PrintLogger.js:53   Store is changed
PrintLogger.js:53   CloseDialogUseCase
PrintLogger.js:53   Store is changed
assert.js:195 Uncaught AssertionError {name: "AssertionError", actual: null, expected: true, operator: "==", message: "null == true"…}
fail @ assert.js:195
ok @ assert.js:215
loadMoreStatuses @ PagingColumn.es6:130
onTimelineScrolled @ PagingColumn.es6:306
ReactErrorUtils.invokeGuardedCallback @ ReactErrorUtils.js:69
executeDispatch @ EventPluginUtils.js:85
executeDispatchesInOrder @ EventPluginUtils.js:108
executeDispatchesAndRelease @ EventPluginHub.js:43
executeDispatchesAndReleaseTopLevel @ EventPluginHub.js:54
forEachAccumulated @ forEachAccumulated.js:24
processEventQueue @ EventPluginHub.js:257
runEventQueueInBatch @ ReactEventEmitterMixin.js:17
handleTopLevel @ ReactEventEmitterMixin.js:28
handleTopLevelImpl @ ReactEventListener.js:72
perform @ Transaction.js:140
batchedUpdates @ ReactDefaultBatchingStrategy.js:62
batchedUpdates @ ReactUpdates.js:97
dispatchEvent @ ReactEventListener.js:147
assert.js:195 Uncaught AssertionError {name: "AssertionError", actual: null, expected: true, operator: "==", message: "null == true"…}
fail @ assert.js:195
ok @ assert.js:215
loadMoreStatuses @ PagingColumn.es6:130
onTimelineScrolled @ PagingColumn.es6:306
ReactErrorUtils.invokeGuardedCallback @ ReactErrorUtils.js:69
executeDispatch @ EventPluginUtils.js:85
executeDispatchesInOrder @ EventPluginUtils.js:108
executeDispatchesAndRelease @ EventPluginHub.js:43
executeDispatchesAndReleaseTopLevel @ EventPluginHub.js:54
forEachAccumulated @ forEachAccumulated.js:24
processEventQueue @ EventPluginHub.js:257
runEventQueueInBatch @ ReactEventEmitterMixin.js:17
handleTopLevel @ ReactEventEmitterMixin.js:28
handleTopLevelImpl @ ReactEventListener.js:72
perform @ Transaction.js:140
batchedUpdates @ ReactDefaultBatchingStrategy.js:62
batchedUpdates @ ReactUpdates.js:97
dispatchEvent @ ReactEventListener.js:147
assert.js:195 Uncaught AssertionError {name: "AssertionError", actual: null, expected: true, operator: "==", message: "null == true"…}actual: nullexpected: truegeneratedMessage: truemessage: "null == true"name: "AssertionError"operator: "=="stack: "AssertionError: null == true?    at NotificationColumn.loadMoreStatuses (https://example.com/static/main.bundle.js?_t=f72be33:22651:29)?    at NotificationColumn.onTimelineScrolled (https://example.com/static/main.bundle.js?_t=f72be33:22888:16)?    at Object.ReactErrorUtils.invokeGuardedCallback (https://example.com/static/main.bundle.js?_t=f72be33:52498:16)?    at executeDispatch (https://example.com/static/main.bundle.js?_t=f72be33:52025:21)?    at Object.executeDispatchesInOrder (https://example.com/static/main.bundle.js?_t=f72be33:52048:5)?    at executeDispatchesAndRelease (https://example.com/static/main.bundle.js?_t=f72be33:21234:22)?    at executeDispatchesAndReleaseTopLevel (https://example.com/static/main.bundle.js?_t=f72be33:21245:10)?    at Array.forEach (native)?    at forEachAccumulated (https://example.com/static/main.bundle.js?_t=f72be33:74000:9)?    at Object.processEventQueue (https://example.com/static/main.bundle.js?_t=f72be33:21448:7)?    at runEventQueueInBatch (https://example.com/static/main.bundle.js?_t=f72be33:113647:18)?    at Object.handleTopLevel [as _handleTopLevel] (https://example.com/static/main.bundle.js?_t=f72be33:113658:5)?    at handleTopLevelImpl (https://example.com/static/main.bundle.js?_t=f72be33:113740:24)?    at ReactDefaultBatchingStrategyTransaction.perform (https://example.com/static/main.bundle.js?_t=f72be33:45332:20)?    at Object.batchedUpdates (https://example.com/static/main.bundle.js?_t=f72be33:113503:26)?    at Object.batchedUpdates (https://example.com/static/main.bundle.js?_t=f72be33:14286:27)?    at dispatchEvent (https://example.com/static/main.bundle.js?_t=f72be33:113815:20)"__proto__: Error
fail @ assert.js:195
ok @ assert.js:215
loadMoreStatuses @ PagingColumn.es6:130
onTimelineScrolled @ PagingColumn.es6:306
ReactErrorUtils.invokeGuardedCallback @ ReactErrorUtils.js:69
executeDispatch @ EventPluginUtils.js:85
executeDispatchesInOrder @ EventPluginUtils.js:108
executeDispatchesAndRelease @ EventPluginHub.js:43
executeDispatchesAndReleaseTopLevel @ EventPluginHub.js:54
forEachAccumulated @ forEachAccumulated.js:24
processEventQueue @ EventPluginHub.js:257
runEventQueueInBatch @ ReactEventEmitterMixin.js:17
handleTopLevel @ ReactEventEmitterMixin.js:28
handleTopLevelImpl @ ReactEventListener.js:72
perform @ Transaction.js:140
batchedUpdates @ ReactDefaultBatchingStrategy.js:62
batchedUpdates @ ReactUpdates.js:97
dispatchEvent @ ReactEventListener.js:147

[shnjp]

あーなるほど　　ありがとうございます！