Xcode 13 featureIdentifier / typeIdentifier crash when deploying to earlier OS releases

[chrisballinger]

Seeing the following crash?

dyld: lazy symbol binding failed: Symbol not found: _$sSo26UIFontDescriptorFeatureKeya5UIKitE17featureIdentifierABvgZ

BonMot/Sources/Platform.swift

Line 30 in 924cda3

let BONFontFeatureTypeIdentifierKey = UIFontDescriptor.FeatureKey.featureIdentifier

#12	0x000000010ffdabc1 in BONFontFeatureTypeIdentifierKey.unsafeMutableAddressor at Platform.swift:30

This is a known bug in Xcode 13 (79090498) that will hopefully be fixed by Apple soon. In the meantime you can't deploy code built with Xcode 13 to OS versions earlier than iOS 15.

Apps that contain Swift code referencing featureIdentifier or typeIdentifier fail to launch on earlier OS releases. (79090498)

https://developer.apple.com/documentation/xcode-release-notes/xcode-13-beta-release-notes

If you find another workaround, please let us know!

[ZevEisenberg]

From Xcode 13 beta 4 release notes:

Apps that contain Swift code referencing featureIdentifier or typeIdentifiernow launch in earlier OS releases. (79090498)