iOS build fails to run in with Xcode 11.0 beta

[vivekhumnabad]

React Native version:

Steps To Reproduce

1.Create a new react-native project with react-native init ""
2.open iOS project and run

Describe what you expected to happen:
Build and run successfully and show launch screen with default UI

What is happening:
Build shows Error Screen saying -
"Unknown argument type 'attribute' in method -[RCTAppState getCurrentappState:error:].
Extend RCTConvert to support this type

Snack, code example, or link to a repository:
Happens with all my existing projects and newly created samples as well.Here is the sample code I have tried.
FinalTry.zip

Please refer to below screenshot for error data

NOTE:
Happens only in newly launched MacOS and Xcode 11 beta

[zhongwuzw]

OMG, seems Xcode 11 beta breaks method signature parsing. Now I have no chance to install Xcode beta. @vivekhumnabad Would you mind paste the method selector string for us? just add the NSLog like below.

[ericlewis]

fixed by #25146

[vivekhumnabad]

@ericlewis Any idea when this will be released???

[ericlewis]

@vivekhumnabad needs to be accepted and merged, which shouldn't take long, and after maybe @grabbou wouldn't mind pulling it in to the 0.60 RC, since it is a pretty minor change? :D

[ericlewis]

@vivekhumnabad its been merged, this will land hopefully in 0.60 or 0.61!

[ollyde]

Would it be possible to get a fix in version precceding 0.60? Say 59?
(0.60 completely breaks a lot of third party packages that are no longer supported)

[betko]

@OllyDixon This fix is already part of the 59.9 react-native.