[Tabs] A crash on swiping a content item #7459
Description
Environment
- tns-core-modules modules: 6.0.0-rc-2019-07-03-223248-02
Describe the bug
Swiping a content item of Tabs crashes the application on iOS.
To Reproduce
<Page>
<Tabs id="tabs">
<TabStrip>
<TabStripItem title="TabStripItem 1">
</TabStripItem>
</TabStrip>
<TabContentItem>
<Label text="TabContentItem 1" />
</TabContentItem>
</Tabs>
</Page>
Output
CONSOLE LOG file:///app/bundle.js:62378:16: ### NativeScriptError: TypeError: undefined is not an object (evaluating 'nextItem.__controller')
CONSOLE LOG file:///app/bundle.js:62379:16: ### nativeException: undefined
CONSOLE LOG file:///app/bundle.js:62380:16: ### stackTrace: JS: 1 pageViewControllerViewControllerAfterViewController@file:///app/Users/vchimev/git/NativeScript/tns-core-modules/ui/tabs/tabs.ts:281:49
2 UIApplicationMain@[native code]
3 _start@file:///app/Users/vchimev/git/NativeScript/tns-core-modules/application/application.ts:321:26