, 0x0, 0x0, 0x6000000}}, [@snprintf={{0x7, 0x0, 0xb, 0x2}, {0x3, 0x2, 0x3, 0xa, 0x9, 0xfff0}, {0x5, 0x0, 0xb, 0x9, 0x0, 0x2}, {0x3, 0x3, 0x6, 0xa, 0xa}, {0x7, 0x1, 0x2, 0x9, 0x8}, {0x7, 0x0, 0x0, 0x8}, {}, {0x7, 0x0, 0x0, 0x4, 0x9}, {}, {0x18, 0x2, 0x2, 0x0, r0}, {}, {0x46, 0x8, 0xfff0, 0x76}}], {{0x7, 0x1, 0xb, 0x8}, {0x6, 0x0, 0x3, 0x8}, {0x85, 0x0, 0x0, 0x7}}}, &(0x7f0000000980)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x90)
panic: replaceArg: group fields don't match: 1/0

goroutine 11 [running]:
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc02e560540?}, {0xe56770?, 0xc02e5608a0?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:377 +0x425
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc02e560520?}, {0xe56770?, 0xc02e560880?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc02e560500?}, {0xe56770?, 0xc02e560860?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc02e5604e0?}, {0xe56770?, 0xc02e560840?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc02e5604c0?}, {0xe56770?, 0xc02e560820?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.(*StructType).mutate(0x16d44a0, 0xc02e5605e0, 0xc025d628c0, {0xe56770, 0xc02e5604a0?}, {0xc025d62828, {0x1db72e0, 0x4, 0x4}, 0xc01010d800, ...})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:490 +0x185
github.com/google/syzkaller/prog.(*Target).mutateArg(0x0?, 0xc0283635c0?, 0xc0069e7dc8?, {0xe56770, 0xc02e5604a0}, {0xc025d62828, {0x1db72e0, 0x4, 0x4}, 0xc01010d800, ...}, ...)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:245 +0xe2
github.com/google/syzkaller/prog.(*mutator).mutateArg(0xc0069e7e48)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:196 +0x245
github.com/google/syzkaller/prog.(*Prog).Mutate(0xc02b5f0a40, {0xe52aa8?, 0xc022c6f590}, 0x1e, 0xc01fe52040, 0xc00009f8f0, {0xc01336a000, 0xfa27, 0x11000})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:51 +0x2ba
main.(*Proc).loop(0xc01fe52340)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:95 +0x365
created by main.main in goroutine 1
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:336 +0x1665