panic: bad arg kind: <nil>

goroutine 38 [running]:
github.com/google/syzkaller/prog.clone(0x0, 0x0, 0xc00344be38, 0xc001aeb320, 0xc001b3fb40)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:79 +0x91b
github.com/google/syzkaller/prog.clone(0x9b2d20, 0xc000fab820, 0xc00344be38, 0x9b2d20, 0xc002cce080)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:57 +0x18d
github.com/google/syzkaller/prog.clone(0x9b2d20, 0xc000faba00, 0xc00344be38, 0x9b2ca0, 0xc001b3f910)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:57 +0x18d
github.com/google/syzkaller/prog.clone(0x9b2d20, 0xc000faba20, 0xc00344be38, 0x40, 0xc00344bb80)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:57 +0x18d
github.com/google/syzkaller/prog.clone(0x9b2d60, 0xc000e3f950, 0xc00344be38, 0x9b2ca0, 0xc001b3f880)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:44 +0x567
github.com/google/syzkaller/prog.clone(0x9b2d20, 0xc000faba40, 0xc00344be38, 0xc00344bec0, 0xc00344bd80)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:57 +0x18d
github.com/google/syzkaller/prog.clone(0x9b2d60, 0xc000e3f980, 0xc00344be38, 0x9b2ca0, 0xc001b3f820)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:44 +0x567
github.com/google/syzkaller/prog.(*Prog).Clone(0xc000e40e80, 0xc0028cdbf0)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:24 +0x279
main.(*Proc).loop(0xc00294a580)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:94 +0x3ca
created by main.main
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:260 +0x1188


OpenBSD/amd64 (ci-openbsd-multicore-9.c.syzkaller.internal) (tty00)

login: