swift

bead2cdb - Don't build arm64e slices of the back-deployed libswift_Concurrency.dylib.

Don't build arm64e slices of the back-deployed libswift_Concurrency.dylib. The arm64e ABI is not stable, so there is no reason to build or ship arm64e slices of the back-deployed libswift_Concurrency.dylib. Moreover, these slices interact poorly with bitcode_strip tool, resulting in a shared library that iOS will refuse to load in certain circumstances. Fixes rdar://85752735 / FB9780976. Thank you to Jay Muthialu and Keith Smiley for helping debug this issue!