it will panic fault when Marshal map (go version 1.18)

[goeoeo]

func TestMarshal(t *testing.T) {
m := make(map[string]string)
m["a"] = "sss&aaa"
s, _ := jsoniter.Marshal(m)
fmt.Println(string(s))
}

//output
=== RUN TestMarshal
unexpected fault address 0x0
fatal error: fault
[signal SIGSEGV: segmentation violation code=0x80 addr=0x0 pc=0x46327f]

goroutine 6 [running]:
runtime.throw({0x5828e5?, 0xc000078ce8?})
/usr/local/go/src/runtime/panic.go:992 +0x71 fp=0xc000078c18 sp=0xc000078be8 pc=0x434fd1
runtime.sigpanic()
/usr/local/go/src/runtime/signal_unix.go:825 +0x305 fp=0xc000078c68 sp=0xc000078c18 pc=0x44afc5

[tamalsaha]

We are also seeing the same issue. Here is a stack trace:

panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x8 pc=0xb08a94]

goroutine 38 [running]:
testing.tRunner.func1.2({0x1e6eba0, 0x2dd46a0})
	/usr/local/go/src/testing/testing.go:1389 +0x366
testing.tRunner.func1()
	/usr/local/go/src/testing/testing.go:1392 +0x5d2
panic({0x1e6eba0, 0x2dd46a0})
	/usr/local/go/src/runtime/panic.go:844 +0x258
github.com/json-iterator/go.(*Stream).WriteStringWithHTMLEscaped(0xc00015c120, {0x8, 0x8})
	/src/vendor/github.com/json-iterator/go/stream_str.go:227 +0x134
github.com/json-iterator/go.(*htmlEscapedStringEncoder).Encode(0xc0005d7700?, 0x1e646e0, 0x41?)
	/src/vendor/github.com/json-iterator/go/config.go:263 +0x65
github.com/json-iterator/go.(*structFieldEncoder).Encode(0xc0001d2720, 0x1e1097e?, 0xc00015c120)
	/src/vendor/github.com/json-iterator/go/reflect_struct_encoder.go:110 +0xad
github.com/json-iterator/go.(*structEncoder).Encode(0xc0001d2fc0, 0xc0004f7640?, 0xc00015c120)
	/src/vendor/github.com/json-iterator/go/reflect_struct_encoder.go:158 +0xd65
github.com/json-iterator/go.(*sliceEncoder).Encode(0xc0000151d0, 0xc0000f1240, 0xc00015c120)
	/src/vendor/github.com/json-iterator/go/reflect_slice.go:38 +0x7cf
github.com/json-iterator/go.(*placeholderEncoder).Encode(0xc000351170, 0xc0000f11a0?, 0x32?)
	/src/vendor/github.com/json-iterator/go/reflect.go:[332](https://github.com/kubeguard/guard/runs/5581979741?check_suite_focus=true#step:7:332) +0x58
github.com/json-iterator/go.(*structFieldEncoder).Encode(0xc0001e10e0, 0x1eba61b?, 0xc00015c120)
	/src/vendor/github.com/json-iterator/go/reflect_struct_encoder.go:110 +0xad
github.com/json-iterator/go.(*structEncoder).Encode(0xc0001e11d0, 0xc0000f1180?, 0xc00015c120)
	/src/vendor/github.com/json-iterator/go/reflect_struct_encoder.go:158 +0xd65
github.com/json-iterator/go.(*structFieldEncoder).Encode(0xc000248510, 0x1e35815?, 0xc00015c120)
	/src/vendor/github.com/json-iterator/go/reflect_struct_encoder.go:110 +0xad
github.com/json-iterator/go.(*structEncoder).Encode(0xc000248600, 0x233a6b8?, 0xc00015c120)
	/src/vendor/github.com/json-iterator/go/reflect_struct_encoder.go:158 +0xd65
github.com/json-iterator/go.(*Stream).WriteVal(0xc00015c120, {0x1f2f840, 0xc0000f1180})
	/src/vendor/github.com/json-iterator/go/reflect.go:98 +0x1f8
github.com/json-iterator/go.(*Encoder).Encode(0xc00011c060, {0x1f2f840, 0xc0000f1180})
	/src/vendor/github.com/json-iterator/go/adapter.go:127 +0x65
go.kubeguard.dev/guard/server.TestServeHTTP(0xc0001e36c0)
	/src/server/handler_test.go:85 +0x91c
testing.tRunner(0xc0001e36c0, 0x210cdc8)
	/usr/local/go/src/testing/testing.go:1439 +0x214
created by testing.(*T).Run
	/usr/local/go/src/testing/testing.go:1486 +0x725

https://github.com/kubeguard/guard/runs/5581979741?check_suite_focus=true

[tamalsaha]

This was fixed in golang/go#48238 (comment)

After updating the versions, our tests are passing. Thanks!

[flarco]

Seeing this as well.

[fuxingZhang]

json-iterator <=1.1.11 + go 1.17 ok
json-iterator <=1.1.11 + go 1.18 bug
json-iterator >=1.1.12 + go 1.18 ok

solution

go get -u github.com/json-iterator/go

[feiquan123]

same fault in my project 😔

[toby-wang]

our service json-iterator=1.1.12 and go=1.18, but panic still occurs occasionally.

	goroutine panic err:runtime error: invalid memory address or nil pointer dereference trace:goroutine 141798238 [running]:
runtime/debug.Stack()
	golang/go/src/runtime/debug/stack.go:24 +0x65
gitlab.myteksi.net/gophers/go/food/common/concurrencyutils.defaultGo.func1.1()
	/go/src/gitlab.myteksi.net/gophers/go/food/common/concurrencyutils/concurrencyutils.go:61 +0x277
panic({0x385af60, 0x75d45d0})
	golang/go/src/runtime/panic.go:838 +0x207
github.com/json-iterator/go.(*Stream).WriteStringWithHTMLEscaped(0xc0624dafc0, {0x0, 0x20})
	/go/src/gitlab.myteksi.net/gophers/go/vendor/github.com/json-iterator/go/stream_str.go:227 +0xbf
github.com/json-iterator/go.(*htmlEscapedStringEncoder).Encode(0x389b340?, 0x1?, 0xc0624dafd8?)
	/go/src/gitlab.myteksi.net/gophers/go/vendor/github.com/json-iterator/go/config.go:263 +0x29
github.com/json-iterator/go.(*structFieldEncoder).Encode(0xc0449ed0b0, 0x34744bd?, 0xc0624dafc0)
	/go/src/gitlab.myteksi.net/gophers/go/vendor/github.com/json-iterator/go/reflect_struct_encoder.go:110 +0x56
github.com/json-iterator/go.(*structEncoder).Encode(0xc0449ed110, 0x0?, 0xc0624dafc0)
	/go/src/gitlab.myteksi.net/gophers/go/vendor/github.com/json-iterator/go/reflect_struct_encoder.go:158 +0x765
github.com/json-iterator/go.(*OptionalEncoder).Encode(0xc01f8c1b58?, 0x40d085?, 0x390ada0?)
	/go/src/gitlab.myteksi.net/gophers/go/vendor/github.com/json-iterator/go/reflect_optional.go:70 +0xa4
github.com/json-iterator/go.(*onePtrEncoder).Encode(0xc00b155d20, 0xc0495b01e0, 0xc01f8c1ba8?)
	/go/src/gitlab.myteksi.net/gophers/go/vendor/github.com/json-iterator/go/reflect.go:219 +0x82
github.com/json-iterator/go.(*Stream).WriteVal(0xc0624dafc0, {0x3573c00, 0xc0495b01e0})
	/go/src/gitlab.myteksi.net/gophers/go/vendor/github.com/json-iterator/go/reflect.go:98 +0x158
github.com/json-iterator/go.(*frozenConfig).Marshal(0xc000137540, {0x3573c00, 0xc0495b01e0})
	/go/src/gitlab.myteksi.net/gophers/go/vendor/github.com/json-iterator/go/config.go:299 +0xc9
gitlab.myteksi.net/gophers/go/food/common/encoding/json.Marshal(...)
	/go/src/gitlab.myteksi.net/gophers/go/food/common/encoding/json/json.go:30
gitlab.myteksi.net/gophers/go/food/mart-api/common/redis.SetAsPipeline({0x4be0ae0, 0xc085e4e450}, {0xc071f48c00, 0x1, 0x1}, {0x35b85e0?, 0xc06ee7b608?})
	/go/src/gitlab.myteksi.net/gophers/go/food/mart-api/common/redis/client.go:346 +0x510
gitlab.myteksi.net/gophers/go/food/mart-api/common/redis.glob..func7({0x4be0ae0, _}, {0x152d13c, {0xc005f68f60, 0xf}, 0x4008fceeb9b2fdd6, 0x40595e13ac206bc5, {0x0, 0x0}, {0x41731ea, ...}, ...}, ...)

[shahbazn]

json-iterator=1.1.12 and go=1.19 -> works
json-iterator=1.1.11 and go=1.19 -> bug

[FarmerChillax]

go version go1.19.1 darwin/arm64 and json-iterator=1.1.12 same this bug

[spade69]

go version 1.20 and json-iterator = 1.1.11 occurs, but json-iterator=1.1.12 fixed it .

[purebluesong]

need to update reflect2:
golang/go#48238 (comment)

[oldthreefeng]

go get -u github.com/json-iterator/go

solution for me.