For me, it crashes in a Swift Package as soon as I call URLSession(configuration: .ephemeral) (located in a static method, called from Task{} within another static method) with EXC_BREAKPOINT (code=1, subcode=0x257b8318c).
It crashes only in the simulator (iOS 26 beta 1), on the device (iOS 26 beta 1) works. Tried on macOS 15.5 (24F74) and Xcode 26 beta 1.
Running it from Xcode 16.4 (16F6) and on iOS 26 simulator also crashes.
Running it from Xcode 16.4 (16F6) and on iOS 18.4 simulator does not crash.
(FB17969913)