omochimetaru

@swift-5.6.3

import _Differentiation @differentiable(reverse) func f(_ x: Float) -> Float { x * x } let dfdx = derivative(of: f) print(dfdx(3))

exit status: 132 with stderr:

_Differentiation/DifferentiationUtilities.swift:40: Fatal error: JVP does not exist. Use '-Xfrontend -enable-experimental-forward-mode-differentiation' to enable differential-first differentiation APIs. Current stack trace: 0 libswiftCore.so 0x00007f6de6bc2920 _swift_stdlib_reportFatalErrorInFile + 112 1 libswiftCore.so 0x00007f6de68baa6c <unavailable> + 1419884 2 libswiftCore.so 0x00007f6de68ba893 <unavailable> + 1419411 3 libswiftCore.so 0x00007f6de68b93a0 _assertionFailure(_:_:file:line:flags:) + 411 4 libswift_Differentiation.so 0x00007f6de2df9ec4 <unavailable> + 163524 7 libswift_Differentiation.so 0x00007f6de2df82a0 valueWithDifferential<A, B>(at:of:) + 106 8 libswift_Differentiation.so 0x00007f6de2df8720 differential<A, B>(at:of:) + 93 9 libswift_Differentiation.so 0x00007f6de2df8a90 derivative<A, B>(at:of:) + 89 10 libswift_Differentiation.so 0x00007f6de2df96b8 <unavailable> + 161464 13 swift-frontend 0x00000000005ccbea <unavailable> + 1887210 14 swift-frontend 0x00000000004d3954 <unavailable> + 866644 15 swift-frontend 0x00000000004993b9 <unavailable> + 627641 16 swift-frontend 0x000000000049893d <unavailable> + 624957 17 swift-frontend 0x000000000048d508 <unavailable> + 578824 18 swift-frontend 0x00000000004463af <unavailable> + 287663 19 libc.so.6 0x00007f6de51fbba0 __libc_start_main + 231 20 swift-frontend 0x0000000000445dda <unavailable> + 286170 Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.6.1 (swift-5.6.1-RELEASE) 2. Compiling with the current