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encoding/json: json.Unmarshal: invalid memory address or nil pointer dereference #60549

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dreamans opened this issue Jun 1, 2023 · 1 comment
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encoding/json: json.Unmarshal: invalid memory address or nil pointer dereference #60549

dreamans opened this issue Jun 1, 2023 · 1 comment

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@dreamans
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dreamans commented Jun 1, 2023 •
edited

What version of Go are you using (go version)?

$ go version

go version go1.16.8 linux/amd64

Does this issue reproduce with the latest release?

problem cannot be reproduced

What operating system and processor architecture are you using (go env)?

go env Output
$ go env

GO111MODULE=""

GOARCH="amd64"

GOBIN=""

GOCACHE="/root/.cache/go-build"

GOENV="/root/.config/go/env"

GOEXE=""

GOFLAGS=""

GOHOSTARCH="amd64"

GOHOSTOS="linux"

GOINSECURE=""

GOMODCACHE="/home/jenkins/go/pkg/mod"

GONOPROXY=""

GONOSUMDB=""

GOOS="linux"

GOPATH="/home/jenkins/go"

GOPRIVATE=""

GOPROXY="https://proxy.golang.org,direct"

GOROOT="/usr/local/go"

GOSUMDB="sum.golang.org"

GOTMPDIR=""

GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"

GOVCS=""

GOVERSION="go1.16.8"

GCCGO="gccgo"

AR="ar"

CC="gcc"

CXX="g++"

CGO_ENABLED="1"

GOMOD="/home/***/go.mod"

CGO_CFLAGS="-g -O2"

CGO_CPPFLAGS=""

CGO_CXXFLAGS="-g -O2"

CGO_FFLAGS="-g -O2"

CGO_LDFLAGS="-g -O2"

PKG_CONFIG="pkg-config"

GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build1677227297=/tmp/go-build -gno-record-gcc-switches"

What did you do?

type BaseResponse struct {
    Code int         `json:"code"`
    Msg  string      `json:"message"`
    Data interface{} `json:"data"`
}

var resp = new(BaseResponse)

var respBytes = []byte(`{"code":0,"msg":"success","data":null}`)

if err = json.Unmarshal(respBytes, resp); err != nil {
    log.Fatalln(err.Error())
}

What did you expect to see?

no panic

What did you see instead?

There is a panic, but it cannot be reproduced

runtime error: invalid memory address or nil pointer dereference, debugstack: /project/***/vendor/github.com/grpc-ecosystem/go-grpc-middleware/recovery/interceptors.go:29 (0xeaa570)
/usr/local/go/src/runtime/panic.go:965 (0x437478)
	gopanic: d._panic = (*_panic)(noescape(unsafe.Pointer(&p)))
/usr/local/go/src/runtime/panic.go:212 (0x43587a)
	panicmem: panic(memoryError)
/usr/local/go/src/runtime/signal_unix.go:734 (0x44e5b2)
	sigpanic: // have been delivered. Give other threads a chance to run and
/usr/local/go/src/runtime/map_faststr.go:112 (0x413b8f)
	mapaccess2_faststr: if h == nil || h.count == 0 {
/usr/local/go/src/encoding/json/decode.go:696 (0x521ccb)
	(*decodeState).object: if i, ok := fields.nameIndex[string(key)]; ok {
/usr/local/go/src/encoding/json/decode.go:370 (0x51f1cc)
	(*decodeState).value: if err := d.object(v); err != nil {
/usr/local/go/src/encoding/json/decode.go:180 (0x51e933)
	(*decodeState).unmarshal: err := d.value(rv)
/usr/local/go/src/encoding/json/decode.go:107 (0x51e2d9)
	Unmarshal: return d.unmarshal(v)
...
/usr/local/go/src/runtime/asm_amd64.s:1371 (0x46e300)
	goexit: // returns to goexit+PCQuantum.
@dreamans dreamans changed the title affected/package: encoding/json, json.Unmarshal: invalid memory address or nil pointer dereference encoding/json: json.Unmarshal: invalid memory address or nil pointer dereference Jun 1, 2023
@seankhliao
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sorry, 1.16 is outside of our support window (2 most recent releases)

@seankhliao seankhliao closed this as not planned Won't fix, can't repro, duplicate, stale Jun 1, 2023
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@dreamans @seankhliao