iOS 13 FBRetainCycleDetector crash when open Guided Access

[CmST0us]

In iOS 13, when I turn on Guided Access switch in Accessibility (just turn on the switch, not enter Guided Access in app), the FBRetainCycleDetector will crash in starting time.
It's easy to reappear.

[youngdfb]

Could you let us know which iPhone you were using? And also which beta version of iOS 13 (it seems that beta 6 launch today or yesterday)?

[CmST0us]

Could you let us know which iPhone you were using? And also which beta version of iOS 13 (it seems that beta 6 launch today or yesterday)?

My device is iPhone XR, and I just tested in iOS 13 beta6, it crashed again!

[youngdfb]

Thanks for the update! Just wanted to be sure it wasn't an old beta version. We will attempt to replicate this on our side.
Turning on the same accessibility option in iOS 12 didn't cause this?
Also, does this only reproduce on a device running iOS 13 or have you managed it with the next XCode beta (of which beta 5 is the latest when I checked yesterday)

[CmST0us]

Thanks for the update! Just wanted to be sure it wasn't an old beta version. We will attempt to replicate this on our side.
Turning on the same accessibility option in iOS 12 didn't cause this?
Also, does this only reproduce on a device running iOS 13 or have you managed it with the next XCode beta (of which beta 5 is the latest when I checked yesterday)

Thanks!
I have try in iOS12.4, it didn't crash. It looks like this problem only happen in iOS 13. And I build my app with Xcode 11 beta5.
BTW: I use Debug building configuration.

[youngdfb]

Thanks for all the information! After we can repro or get a fix, we will let you know

[youngdfb]

There has been a commit synced from Facebook's Fishhook repository: c3d5fb9
This was an issue specific to iOS 13. Could you please pull the latest and let us know if your issue is resolved? Thanks!

[CmST0us]

There has been a commit synced from Facebook's Fishhook repository: c3d5fb9
This was an issue specific to iOS 13. Could you please pull the latest and let us know if your issue is resolved? Thanks!

YES! It works!
Thank you very much!

[ThaiLanKing]

It happend on iPhone XR(iOS13.1),anohter iPhoneX(iOS13.1) is OK,and crash here:indirect_symbol_bindings[i] = cur->rebindings[j].replacement;