panic when run gcWriteBarrier ( Linux golang 1.11 )

[pkujhd]

package main

func main() {
        max := 1024 * 32
        VMap := make(map[int][]*int)
        for i := 0xFF; i < max; i++ {
                VMap[i] = append(VMap[i], &i)
        }
}

result:

fatal error: workbuf is not empty

runtime stack:
runtime.throw(0x7794c3, 0x14)
        /home/pkujhd/programs/go.1.11.12/src/runtime/panic.go:608 +0x72
runtime.(*workbuf).checkempty(0xc0003d1800)
        /home/pkujhd/programs/go.1.11.12/src/runtime/mgcwork.go:359 +0x4c
runtime.getempty(0xc0003d1800)
        /home/pkujhd/programs/go.1.11.12/src/runtime/mgcwork.go:371 +0x1f7
runtime.(*gcWork).putBatch(0xc000021270, 0xc0000212a0, 0x7, 0x187)
        /home/pkujhd/programs/go.1.11.12/src/runtime/mgcwork.go:172 +0x5f
runtime.wbBufFlush1(0xc000020000)
        /home/pkujhd/programs/go.1.11.12/src/runtime/mwbbuf.go:272 +0x1f7
runtime.wbBufFlush.func1()
        /home/pkujhd/programs/go.1.11.12/src/runtime/mwbbuf.go:195 +0x3a
runtime.systemstack(0x0)
        /home/pkujhd/programs/go.1.11.12/src/runtime/asm_amd64.s:351 +0x66
runtime.mstart()
        /home/pkujhd/programs/go.1.11.12/src/runtime/proc.go:1229

goroutine 1 [running]:
runtime.systemstack_switch()
        /home/pkujhd/programs/go.1.11.12/src/runtime/asm_amd64.s:311 fp=0xc00055b310 sp=0xc00055b308 pc=0x456230
runtime.wbBufFlush(0xc0003a8140, 0xc0005ae0c0)
        /home/pkujhd/programs/go.1.11.12/src/runtime/mwbbuf.go:194 +0x4e fp=0xc00055b330 sp=0xc00055b310 pc=0x427ece
runtime.gcWriteBarrier(0x6da3a0, 0x0, 0x0, 0x0, 0x1, 0xc0005ae0c0, 0x0, 0x1, 0xc0003a8140, 0xc000015c00, ...)
        /home/pkujhd/programs/go.1.11.12/src/runtime/asm_amd64.s:1420 +0xb4 fp=0xc00055b3b8 sp=0xc00055b330 pc=0x4583d4
main.main()
        /home/pkujhd/go/base.go:7 +0x176 fp=0xc00055b558 sp=0xc00055b3b8 pc=0x7f5abf5ac176
main.main()
        /home/pkujhd/go/src/github.com/pkujhd/goloader/examples/loader/loader.go:98 +0xffb fp=0xc00055bf98 sp=0xc00055b558 pc=0x6b159b
runtime.main()
        /home/pkujhd/programs/go.1.11.12/src/runtime/proc.go:201 +0x207 fp=0xc00055bfe0 sp=0xc00055bf98 pc=0x42d7a7
runtime.goexit()
        /home/pkujhd/programs/go.1.11.12/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00055bfe8 sp=0xc00055bfe0 pc=0x458311