54997066ad59d0624ec7bebe1ed2060dae380ede2b4e8281dc688b3bb750b12bcf26455"], &(0x7f00000003c0)={0x0, 0xa, 0x1, 0xe6}, &(0x7f0000000400)={0x0, 0x8, 0x1, 0x3}, &(0x7f0000000440)={0x20, 0x1, 0x88, "0b837c9c50025ae6920439b9ff690a42974f041bf4a61bd46b283b3e44b37ab5143a3015a0911aaeaa841e53e44f3afb5c48c97f339fd33a66235d20f46842f4e5462861a991efa92cd1ecac1a652fa870beab60071138a713bcd924f0f48d4f66a1284ca4d534ed7d916511b7c5fbb5f2f8ac3187c7943c22b235afca6fa2e7e0087556f468a925"}, &(0x7f0000000500)={0x20, 0x3, 0x1, 0xa}})
panic: replaceArg: group fields don't match: 0/1

goroutine 11 [running]:
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc0007a8c00?}, {0xe56770?, 0xc0007a8fe0?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:377 +0x425
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc0007a8be0?}, {0xe56770?, 0xc0007a8fc0?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc0007a8bc0?}, {0xe56770?, 0xc0007a8fa0?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc0007a8ba0?}, {0xe56770?, 0xc0007a8f80?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.replaceArg({0xe56770?, 0xc0007a8b80?}, {0xe56770?, 0xc0007a8f60?})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:382 +0x345
github.com/google/syzkaller/prog.(*StructType).mutate(0x16d44a0, 0xc0007a8c20, 0xc000e39590, {0xe56770, 0xc0007a8b60?}, {0xc000e39408, {0x1db72e0, 0x4, 0x4}, 0xc001284000, ...})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:490 +0x185
github.com/google/syzkaller/prog.(*Target).mutateArg(0x0?, 0xc000a9b100?, 0xc0006e9dc8?, {0xe56770, 0xc0007a8b60}, {0xc000e39408, {0x1db72e0, 0x4, 0x4}, 0xc001284000, ...}, ...)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:245 +0xe2
github.com/google/syzkaller/prog.(*mutator).mutateArg(0xc001319e48)
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:196 +0x245
github.com/google/syzkaller/prog.(*Prog).Mutate(0xc000fc5940, {0xe52aa8?, 0xc0005e0600}, 0x1e, 0xc001768000, 0xc00007aff0, {0xc0000ce000, 0x55f, 0x700})
	/syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:51 +0x2ba
main.(*Proc).loop(0xc000ff5840)
	/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