EXC_BAD_ACCESS crashes on iOS 11 context presentRenderbuffer

I upgrade to iOS11 and xcode (Version 9.0 beta (9M136h)) and met the crash about context_ presentRenderbuffer

It works fine on xcode Version 8.3 (8E162) and iOS 10.3.3

Both Xcode 9 and iOS11 are in beta version, right? I think it is better to wait stable version.

And this thread says only has crash in beta4. So i think the beta version is not stable.