Package not compiling in Xcode 27 beta: ambiguous use of `cs_sync`

[MariusDeReus]

First noticed in Xcode 27 beta 5, still compiles in Xcode 26.5.
Using Swift Package, version 9.3.0 (last version as far as I can see).

Compiler fails on this line return try transaction.transactionQueue.cs_sync { () throws(CoreStoreError) -> T in (DataStack+Transaction, line) with the error Ambiguous use of cs_sync. It cannot determine which of the two existing overloads of this function in DispatchQueue+CoreStore to use.

Note: version 9.2.0 does compile, so downgrading is the workaround for now.