Merge pull request #57142 from nikhita/bump-jsoniter

Automatic merge from submit-queue (batch tested with PRs 57122, 57142, 57016, 56927, 56678). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

bump(13f864): github.com/json-iterator/go: use ConfigCompatibleWithStandardLibrary

Jsoniter in `ConfigFastest` mode does not support escape characters in object keys, whereas `ConfigCompatibleWithStandardLibrary` does.

Fixes kubernetes/kubernetes#56018
Related kubernetes/kubernetes#56055

Benchmark results:

```
BenchmarkDecodeIntoJSON-4                                              	   30000	     48522 ns/op	    3792 B/op	      63 allocs/op
BenchmarkDecodeIntoJSONCodecGenConfigFast-4                            	  100000	     17409 ns/op	    4524 B/op	      96 allocs/op
BenchmarkDecodeIntoJSONCodecGenConfigCompatibleWithStandardLibrary-4   	  100000	     18617 ns/op	    4924 B/op	     121 allocs/op
```

/assign sttts thockin mfojtik

Kubernetes-commit: 135d58b3941fac99ae0426e18cbda266b83ca49e

Godeps/Godeps.json

@@ -228,7 +228,7 @@
 		},
 		{
 			"ImportPath": "github.com/json-iterator/go",
-			"Rev": "36b14963da70d11297d313183d7e6388c8510e1e"
+			"Rev": "13f86432b882000a51c6e610c620974462691a97"
 		},
 		{
 			"ImportPath": "github.com/juju/ratelimit",
@@ -488,215 +488,215 @@
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/api/equality",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/api/errors",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/api/meta",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/api/resource",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/api/testing",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/api/testing/fuzzer",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/api/testing/roundtrip",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/apimachinery",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/apimachinery/announced",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/apimachinery/registered",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/apis/meta/fuzzer",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/apis/meta/internalversion",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/apis/meta/v1",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/apis/meta/v1alpha1",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/conversion",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/conversion/queryparams",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/fields",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/labels",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/runtime",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/runtime/schema",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/runtime/serializer",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/runtime/serializer/json",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/runtime/serializer/protobuf",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/runtime/serializer/recognizer",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/runtime/serializer/streaming",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/runtime/serializer/versioning",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/selection",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/types",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/cache",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/clock",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/diff",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/errors",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/framer",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/httpstream",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/httpstream/spdy",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/intstr",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/json",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/mergepatch",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/net",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/remotecommand",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/runtime",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/sets",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/strategicpatch",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/validation",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/validation/field",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/wait",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/util/yaml",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/version",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/pkg/watch",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/third_party/forked/golang/json",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/third_party/forked/golang/netutil",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery/third_party/forked/golang/reflect",
-			"Rev": "a88dfdd72a1d320a70de7ab2bb3375cfdf237864"
+			"Rev": "5250765d28a6a1e07c6f09fe814a4b58ad74cc11"
 		},
 		{
 			"ImportPath": "k8s.io/kube-openapi/pkg/common",

vendor/github.com/json-iterator/go/.gitignore

@@ -1,3 +1,4 @@
-.idea
+/vendor
+/bug_test.go
 /coverage.txt
-/profile.out
+/.idea

vendor/github.com/json-iterator/go/.travis.yml

@@ -2,6 +2,7 @@ language: go
 
 go:
   - 1.8.x
+  - 1.x
 
 before_install:
   - go get -t -v ./...

vendor/github.com/json-iterator/go/Gopkg.lock

@@ -0,0 +1,33 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  name = "github.com/davecgh/go-spew"
+  packages = ["spew"]
+  revision = "346938d642f2ec3594ed81d874461961cd0faa76"
+  version = "v1.1.0"
+
+[[projects]]
+  branch = "master"
+  name = "github.com/google/gofuzz"
+  packages = ["."]
+  revision = "24818f796faf91cd76ec7bddd72458fbced7a6c1"
+
+[[projects]]
+  name = "github.com/pmezard/go-difflib"
+  packages = ["difflib"]
+  revision = "792786c7400a136282c1664665ae0a8db921c6c2"
+  version = "v1.0.0"
+
+[[projects]]
+  name = "github.com/stretchr/testify"
+  packages = ["assert","require"]
+  revision = "69483b4bd14f5845b5a1e55bca19e954e827f1d0"
+  version = "v1.1.4"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  inputs-digest = "f8b7cf3941d3792cbbd570bb53c093adaf774334d1162c651565c97a58dc9d09"
+  solver-name = "gps-cdcl"
+  solver-version = 1

vendor/github.com/json-iterator/go/Gopkg.toml

@@ -0,0 +1,33 @@
+# Gopkg.toml example
+#
+# Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/user/thing/cmd/thing"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#  name = "github.com/x/y"
+#  version = "2.4.0"
+
+
+[[constraint]]
+  name = "github.com/davecgh/go-spew"
+  version = "1.1.0"
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/google/gofuzz"
+
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  version = "1.1.4"

vendor/github.com/json-iterator/go/README.md

@@ -44,7 +44,9 @@ with
 
 ```go
 import "github.com/json-iterator/go"
-jsoniter.Marshal(&data)
+
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
+json.Marshal(&data)
 ```
 
 Replace
@@ -58,7 +60,9 @@ with
 
 ```go
 import "github.com/json-iterator/go"
-jsoniter.Unmarshal(input, &data)
+
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
+json.Unmarshal(input, &data)
 ```
 
 [More documentation](http://jsoniter.com/migrate-from-go-std.html)
@@ -76,5 +80,7 @@ Contributors
 * [thockin](https://github.com/thockin) 
 * [mattn](https://github.com/mattn)
 * [cch123](https://github.com/cch123)
+* [Oleg Shaldybin](https://github.com/olegshaldybin)
+* [Jason Toffaletti](https://github.com/toffaletti)
 
 Report issue or pull request, or email taowen@gmail.com, or [![Gitter chat](https://badges.gitter.im/gitterHQ/gitter.png)](https://gitter.im/json-iterator/Lobby)

vendor/github.com/json-iterator/go/build.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+set -e
+set -x
+
+if [ ! -d /tmp/build-golang/src/github.com/json-iterator ]; then
+    mkdir -p /tmp/build-golang/src/github.com/json-iterator
+    ln -s $PWD /tmp/build-golang/src/github.com/json-iterator/go
+fi
+export GOPATH=/tmp/build-golang
+go get -u github.com/golang/dep/cmd/dep
+cd /tmp/build-golang/src/github.com/json-iterator/go
+exec $GOPATH/bin/dep ensure -update

vendor/github.com/json-iterator/go/feature_adapter.go

@@ -110,6 +110,7 @@ type Encoder struct {
 // Encode encode interface{} as JSON to io.Writer
 func (adapter *Encoder) Encode(val interface{}) error {
 	adapter.stream.WriteVal(val)
+	adapter.stream.WriteRaw("\n")
 	adapter.stream.Flush()
 	return adapter.stream.Error
 }
@@ -125,3 +126,8 @@ func (adapter *Encoder) SetEscapeHTML(escapeHTML bool) {
 	config.EscapeHTML = escapeHTML
 	adapter.stream.cfg = config.Froze().(*frozenConfig)
 }
+
+// Valid reports whether data is a valid JSON encoding.
+func Valid(data []byte) bool {
+	return ConfigDefault.Valid(data)
+}

vendor/github.com/json-iterator/go/feature_any.go

@@ -1,6 +1,7 @@
 package jsoniter
 
 import (
+	"errors"
 	"fmt"
 	"io"
 	"reflect"
@@ -157,6 +158,8 @@ func (iter *Iterator) readAny() Any {
 		return iter.readArrayAny()
 	case '-':
 		return iter.readNumberAny(false)
+	case 0:
+		return &invalidAny{baseAny{}, errors.New("input is empty")}
 	default:
 		return iter.readNumberAny(true)
 	}

vendor/github.com/json-iterator/go/feature_config.go

@@ -18,12 +18,15 @@ type Config struct {
 	SortMapKeys                   bool
 	UseNumber                     bool
 	TagKey                        string
+	ValidateJsonRawMessage        bool
+	ObjectFieldMustBeSimpleString bool
 }
 
 type frozenConfig struct {
 	configBeforeFrozen            Config
 	sortMapKeys                   bool
 	indentionStep                 int
+	objectFieldMustBeSimpleString bool
 	decoderCache                  unsafe.Pointer
 	encoderCache                  unsafe.Pointer
 	extensions                    []Extension
@@ -44,6 +47,8 @@ type API interface {
 	Get(data []byte, path ...interface{}) Any
 	NewEncoder(writer io.Writer) *Encoder
 	NewDecoder(reader io.Reader) *Decoder
+	Valid(data []byte) bool
+	RegisterExtension(extension Extension)
 }
 
 // ConfigDefault the default API
@@ -55,12 +60,14 @@ var ConfigDefault = Config{
 var ConfigCompatibleWithStandardLibrary = Config{
 	EscapeHTML:             true,
 	SortMapKeys:            true,
+	ValidateJsonRawMessage: true,
 }.Froze()
 
 // ConfigFastest marshals float with only 6 digits precision
 var ConfigFastest = Config{
 	EscapeHTML:                    false,
-	MarshalFloatWith6Digits: true,
+	MarshalFloatWith6Digits:       true, // will lose precession
+	ObjectFieldMustBeSimpleString: true, // do not unescape object field
 }.Froze()
 
 // Froze forge API from config
@@ -69,6 +76,7 @@ func (cfg Config) Froze() API {
 	frozenConfig := &frozenConfig{
 		sortMapKeys:                   cfg.SortMapKeys,
 		indentionStep:                 cfg.IndentionStep,
+		objectFieldMustBeSimpleString: cfg.ObjectFieldMustBeSimpleString,
 		streamPool:                    make(chan *Stream, 16),
 		iteratorPool:                  make(chan *Iterator, 16),
 	}
@@ -83,10 +91,31 @@ func (cfg Config) Froze() API {
 	if cfg.UseNumber {
 		frozenConfig.useNumber()
 	}
+	if cfg.ValidateJsonRawMessage {
+		frozenConfig.validateJsonRawMessage()
+	}
 	frozenConfig.configBeforeFrozen = cfg
 	return frozenConfig
 }
 
+func (cfg *frozenConfig) validateJsonRawMessage() {
+	encoder := &funcEncoder{func(ptr unsafe.Pointer, stream *Stream) {
+		rawMessage := *(*json.RawMessage)(ptr)
+		iter := cfg.BorrowIterator([]byte(rawMessage))
+		iter.Read()
+		if iter.Error != nil {
+			stream.WriteRaw("null")
+		} else {
+			cfg.ReturnIterator(iter)
+			stream.WriteRaw(string(rawMessage))
+		}
+	}, func(ptr unsafe.Pointer) bool {
+		return false
+	}}
+	cfg.addEncoderToCache(reflect.TypeOf((*json.RawMessage)(nil)).Elem(), encoder)
+	cfg.addEncoderToCache(reflect.TypeOf((*RawMessage)(nil)).Elem(), encoder)
+}
+
 func (cfg *frozenConfig) useNumber() {
 	cfg.addDecoderToCache(reflect.TypeOf((*interface{})(nil)).Elem(), &funcDecoder{func(ptr unsafe.Pointer, iter *Iterator) {
 		if iter.WhatIsNext() == NumberValue {
@@ -104,7 +133,7 @@ func (cfg *frozenConfig) getTagKey() string {
 	return tagKey
 }
 
-func (cfg *frozenConfig) registerExtension(extension Extension) {
+func (cfg *frozenConfig) RegisterExtension(extension Extension) {
 	cfg.extensions = append(cfg.extensions, extension)
 }
 
@@ -310,3 +339,10 @@ func (cfg *frozenConfig) NewDecoder(reader io.Reader) *Decoder {
 	iter := Parse(cfg, reader, 512)
 	return &Decoder{iter}
 }
+
+func (cfg *frozenConfig) Valid(data []byte) bool {
+	iter := cfg.BorrowIterator(data)
+	defer cfg.ReturnIterator(iter)
+	iter.Skip()
+	return iter.Error == nil
+}

vendor/github.com/json-iterator/go/feature_iter.go

@@ -77,6 +77,7 @@ type Iterator struct {
 	captureStartedAt int
 	captured         []byte
 	Error            error
+	Attachment       interface{} // open for customized decoder
 }
 
 // NewIterator creates an empty Iterator instance
@@ -167,7 +168,7 @@ func (iter *Iterator) isObjectEnd() bool {
 	if c == '}' {
 		return true
 	}
-	iter.ReportError("isObjectEnd", "object ended prematurely")
+	iter.ReportError("isObjectEnd", "object ended prematurely, unexpected char "+string([]byte{c}))
 	return true
 }
 
@@ -200,8 +201,22 @@ func (iter *Iterator) ReportError(operation string, msg string) {
 	if peekStart < 0 {
 		peekStart = 0
 	}
-	iter.Error = fmt.Errorf("%s: %s, parsing %v ...%s... at %s", operation, msg, iter.head,
+	peekEnd := iter.head + 10
-		string(iter.buf[peekStart:iter.head]), string(iter.buf[0:iter.tail]))
+	if peekEnd > iter.tail {
+		peekEnd = iter.tail
+	}
+	parsing := string(iter.buf[peekStart:peekEnd])
+	contextStart := iter.head - 50
+	if contextStart < 0 {
+		contextStart = 0
+	}
+	contextEnd := iter.head + 50
+	if contextEnd > iter.tail {
+		contextEnd = iter.tail
+	}
+	context := string(iter.buf[contextStart:contextEnd])
+	iter.Error = fmt.Errorf("%s: %s, error found in #%v byte of ...|%s|..., bigger context ...|%s|...",
+		operation, msg, iter.head-peekStart, parsing, context)
 }
 
 // CurrentBuffer gets current buffer as string for debugging purpose
@@ -210,7 +225,7 @@ func (iter *Iterator) CurrentBuffer() string {
 	if peekStart < 0 {
 		peekStart = 0
 	}
-	return fmt.Sprintf("parsing %v ...|%s|... at %s", iter.head,
+	return fmt.Sprintf("parsing #%v byte, around ...|%s|..., whole buffer ...|%s|...", iter.head,
 		string(iter.buf[peekStart:iter.head]), string(iter.buf[0:iter.tail]))
 }
 

vendor/github.com/json-iterator/go/feature_iter_array.go

@@ -19,7 +19,7 @@ func (iter *Iterator) ReadArray() (ret bool) {
 	case ',':
 		return true
 	default:
-		iter.ReportError("ReadArray", "expect [ or , or ] or n, but found: "+string([]byte{c}))
+		iter.ReportError("ReadArray", "expect [ or , or ] or n, but found "+string([]byte{c}))
 		return
 	}
 }
@@ -42,7 +42,7 @@ func (iter *Iterator) ReadArrayCB(callback func(*Iterator) bool) (ret bool) {
 				c = iter.nextToken()
 			}
 			if c != ']' {
-				iter.ReportError("ReadArrayCB", "expect ] in the end")
+				iter.ReportError("ReadArrayCB", "expect ] in the end, but found "+string([]byte{c}))
 				return false
 			}
 			return true
@@ -53,6 +53,6 @@ func (iter *Iterator) ReadArrayCB(callback func(*Iterator) bool) (ret bool) {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return true // null
 	}
-	iter.ReportError("ReadArrayCB", "expect [ or n, but found: "+string([]byte{c}))
+	iter.ReportError("ReadArrayCB", "expect [ or n, but found "+string([]byte{c}))
 	return false
 }

vendor/github.com/json-iterator/go/feature_iter_int.go

@@ -115,6 +115,7 @@ func (iter *Iterator) ReadUint32() (ret uint32) {
 func (iter *Iterator) readUint32(c byte) (ret uint32) {
 	ind := intDigits[c]
 	if ind == 0 {
+		iter.assertInteger()
 		return 0 // single zero
 	}
 	if ind == invalidCharForNumber {
@@ -127,12 +128,14 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 		ind2 := intDigits[iter.buf[i]]
 		if ind2 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value
 		}
 		i++
 		ind3 := intDigits[iter.buf[i]]
 		if ind3 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*10 + uint32(ind2)
 		}
 		//iter.head = i + 1
@@ -141,30 +144,35 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 		ind4 := intDigits[iter.buf[i]]
 		if ind4 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*100 + uint32(ind2)*10 + uint32(ind3)
 		}
 		i++
 		ind5 := intDigits[iter.buf[i]]
 		if ind5 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*1000 + uint32(ind2)*100 + uint32(ind3)*10 + uint32(ind4)
 		}
 		i++
 		ind6 := intDigits[iter.buf[i]]
 		if ind6 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*10000 + uint32(ind2)*1000 + uint32(ind3)*100 + uint32(ind4)*10 + uint32(ind5)
 		}
 		i++
 		ind7 := intDigits[iter.buf[i]]
 		if ind7 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*100000 + uint32(ind2)*10000 + uint32(ind3)*1000 + uint32(ind4)*100 + uint32(ind5)*10 + uint32(ind6)
 		}
 		i++
 		ind8 := intDigits[iter.buf[i]]
 		if ind8 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*1000000 + uint32(ind2)*100000 + uint32(ind3)*10000 + uint32(ind4)*1000 + uint32(ind5)*100 + uint32(ind6)*10 + uint32(ind7)
 		}
 		i++
@@ -172,6 +180,7 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 		value = value*10000000 + uint32(ind2)*1000000 + uint32(ind3)*100000 + uint32(ind4)*10000 + uint32(ind5)*1000 + uint32(ind6)*100 + uint32(ind7)*10 + uint32(ind8)
 		iter.head = i
 		if ind9 == invalidCharForNumber {
+			iter.assertInteger()
 			return value
 		}
 	}
@@ -180,6 +189,7 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 			ind = intDigits[iter.buf[i]]
 			if ind == invalidCharForNumber {
 				iter.head = i
+				iter.assertInteger()
 				return value
 			}
 			if value > uint32SafeToMultiply10 {
@@ -194,6 +204,7 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 			value = (value << 3) + (value << 1) + uint32(ind)
 		}
 		if !iter.loadMore() {
+			iter.assertInteger()
 			return value
 		}
 	}
@@ -226,6 +237,7 @@ func (iter *Iterator) ReadUint64() uint64 {
 func (iter *Iterator) readUint64(c byte) (ret uint64) {
 	ind := intDigits[c]
 	if ind == 0 {
+		iter.assertInteger()
 		return 0 // single zero
 	}
 	if ind == invalidCharForNumber {
@@ -233,11 +245,73 @@ func (iter *Iterator) readUint64(c byte) (ret uint64) {
 		return
 	}
 	value := uint64(ind)
+	if iter.tail-iter.head > 10 {
+		i := iter.head
+		ind2 := intDigits[iter.buf[i]]
+		if ind2 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value
+		}
+		i++
+		ind3 := intDigits[iter.buf[i]]
+		if ind3 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*10 + uint64(ind2)
+		}
+		//iter.head = i + 1
+		//value = value * 100 + uint32(ind2) * 10 + uint32(ind3)
+		i++
+		ind4 := intDigits[iter.buf[i]]
+		if ind4 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*100 + uint64(ind2)*10 + uint64(ind3)
+		}
+		i++
+		ind5 := intDigits[iter.buf[i]]
+		if ind5 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*1000 + uint64(ind2)*100 + uint64(ind3)*10 + uint64(ind4)
+		}
+		i++
+		ind6 := intDigits[iter.buf[i]]
+		if ind6 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*10000 + uint64(ind2)*1000 + uint64(ind3)*100 + uint64(ind4)*10 + uint64(ind5)
+		}
+		i++
+		ind7 := intDigits[iter.buf[i]]
+		if ind7 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*100000 + uint64(ind2)*10000 + uint64(ind3)*1000 + uint64(ind4)*100 + uint64(ind5)*10 + uint64(ind6)
+		}
+		i++
+		ind8 := intDigits[iter.buf[i]]
+		if ind8 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*1000000 + uint64(ind2)*100000 + uint64(ind3)*10000 + uint64(ind4)*1000 + uint64(ind5)*100 + uint64(ind6)*10 + uint64(ind7)
+		}
+		i++
+		ind9 := intDigits[iter.buf[i]]
+		value = value*10000000 + uint64(ind2)*1000000 + uint64(ind3)*100000 + uint64(ind4)*10000 + uint64(ind5)*1000 + uint64(ind6)*100 + uint64(ind7)*10 + uint64(ind8)
+		iter.head = i
+		if ind9 == invalidCharForNumber {
+			iter.assertInteger()
+			return value
+		}
+	}
 	for {
 		for i := iter.head; i < iter.tail; i++ {
 			ind = intDigits[iter.buf[i]]
 			if ind == invalidCharForNumber {
 				iter.head = i
+				iter.assertInteger()
 				return value
 			}
 			if value > uint64SafeToMultiple10 {
@@ -252,7 +326,14 @@ func (iter *Iterator) readUint64(c byte) (ret uint64) {
 			value = (value << 3) + (value << 1) + uint64(ind)
 		}
 		if !iter.loadMore() {
+			iter.assertInteger()
 			return value
 		}
 	}
 }
+
+func (iter *Iterator) assertInteger() {
+	if iter.head < len(iter.buf) && iter.buf[iter.head] == '.' {
+		iter.ReportError("assertInteger", "can not decode float as int")
+	}
+}

vendor/github.com/json-iterator/go/feature_iter_object.go

@@ -19,15 +19,33 @@ func (iter *Iterator) ReadObject() (ret string) {
 		c = iter.nextToken()
 		if c == '"' {
 			iter.unreadByte()
+			if iter.cfg.objectFieldMustBeSimpleString {
 				return string(iter.readObjectFieldAsBytes())
+			} else {
+				field := iter.ReadString()
+				c = iter.nextToken()
+				if c != ':' {
+					iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+				}
+				return field
+			}
 		}
 		if c == '}' {
 			return "" // end of object
 		}
-		iter.ReportError("ReadObject", `expect " after {`)
+		iter.ReportError("ReadObject", `expect " after {, but found `+string([]byte{c}))
 		return
 	case ',':
+		if iter.cfg.objectFieldMustBeSimpleString {
 			return string(iter.readObjectFieldAsBytes())
+		} else {
+			field := iter.ReadString()
+			c = iter.nextToken()
+			if c != ':' {
+				iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+			}
+			return field
+		}
 	case '}':
 		return "" // end of object
 	default:
@@ -44,17 +62,34 @@ func (iter *Iterator) readFieldHash() int32 {
 			for i := iter.head; i < iter.tail; i++ {
 				// require ascii string and no escape
 				b := iter.buf[i]
+				if !iter.cfg.objectFieldMustBeSimpleString && b == '\\' {
+					iter.head = i
+					for _, b := range iter.readStringSlowPath() {
 						if 'A' <= b && b <= 'Z' {
 							b += 'a' - 'A'
 						}
+						hash ^= int64(b)
+						hash *= 0x1000193
+					}
+					c = iter.nextToken()
+					if c != ':' {
+						iter.ReportError("readFieldHash", `expect :, but found `+string([]byte{c}))
+						return 0
+					}
+					return int32(hash)
+				}
 				if b == '"' {
 					iter.head = i + 1
 					c = iter.nextToken()
 					if c != ':' {
 						iter.ReportError("readFieldHash", `expect :, but found `+string([]byte{c}))
+						return 0
 					}
 					return int32(hash)
 				}
+				if 'A' <= b && b <= 'Z' {
+					b += 'a' - 'A'
+				}
 				hash ^= int64(b)
 				hash *= 0x1000193
 			}
@@ -80,18 +115,38 @@ func calcHash(str string) int32 {
 // ReadObjectCB read object with callback, the key is ascii only and field name not copied
 func (iter *Iterator) ReadObjectCB(callback func(*Iterator, string) bool) bool {
 	c := iter.nextToken()
+	var fieldBytes []byte
+	var field string
 	if c == '{' {
 		c = iter.nextToken()
 		if c == '"' {
 			iter.unreadByte()
-			field := iter.readObjectFieldAsBytes()
+			if iter.cfg.objectFieldMustBeSimpleString {
-			if !callback(iter, *(*string)(unsafe.Pointer(&field))) {
+				fieldBytes = iter.readObjectFieldAsBytes()
+				field = *(*string)(unsafe.Pointer(&fieldBytes))
+			} else {
+				field = iter.ReadString()
+				c = iter.nextToken()
+				if c != ':' {
+					iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+				}
+			}
+			if !callback(iter, field) {
 				return false
 			}
 			c = iter.nextToken()
 			for c == ',' {
-				field = iter.readObjectFieldAsBytes()
+				if iter.cfg.objectFieldMustBeSimpleString {
-				if !callback(iter, *(*string)(unsafe.Pointer(&field))) {
+					fieldBytes = iter.readObjectFieldAsBytes()
+					field = *(*string)(unsafe.Pointer(&fieldBytes))
+				} else {
+					field = iter.ReadString()
+					c = iter.nextToken()
+					if c != ':' {
+						iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+					}
+				}
+				if !callback(iter, field) {
 					return false
 				}
 				c = iter.nextToken()
@@ -105,14 +160,14 @@ func (iter *Iterator) ReadObjectCB(callback func(*Iterator, string) bool) bool {
 		if c == '}' {
 			return true
 		}
-		iter.ReportError("ReadObjectCB", `expect " after }`)
+		iter.ReportError("ReadObjectCB", `expect " after }, but found `+string([]byte{c}))
 		return false
 	}
 	if c == 'n' {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return true // null
 	}
-	iter.ReportError("ReadObjectCB", `expect { or n`)
+	iter.ReportError("ReadObjectCB", `expect { or n, but found `+string([]byte{c}))
 	return false
 }
 
@@ -125,7 +180,7 @@ func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
 			iter.unreadByte()
 			field := iter.ReadString()
 			if iter.nextToken() != ':' {
-				iter.ReportError("ReadMapCB", "expect : after object field")
+				iter.ReportError("ReadMapCB", "expect : after object field, but found "+string([]byte{c}))
 				return false
 			}
 			if !callback(iter, field) {
@@ -135,7 +190,7 @@ func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
 			for c == ',' {
 				field = iter.ReadString()
 				if iter.nextToken() != ':' {
-					iter.ReportError("ReadMapCB", "expect : after object field")
+					iter.ReportError("ReadMapCB", "expect : after object field, but found "+string([]byte{c}))
 					return false
 				}
 				if !callback(iter, field) {
@@ -152,14 +207,14 @@ func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
 		if c == '}' {
 			return true
 		}
-		iter.ReportError("ReadMapCB", `expect " after }`)
+		iter.ReportError("ReadMapCB", `expect " after }, but found `+string([]byte{c}))
 		return false
 	}
 	if c == 'n' {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return true // null
 	}
-	iter.ReportError("ReadMapCB", `expect { or n`)
+	iter.ReportError("ReadMapCB", `expect { or n, but found `+string([]byte{c}))
 	return false
 }
 
@@ -176,7 +231,7 @@ func (iter *Iterator) readObjectStart() bool {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return false
 	}
-	iter.ReportError("readObjectStart", "expect { or n")
+	iter.ReportError("readObjectStart", "expect { or n, but found "+string([]byte{c}))
 	return false
 }
 
@@ -192,7 +247,7 @@ func (iter *Iterator) readObjectFieldAsBytes() (ret []byte) {
 		}
 	}
 	if iter.buf[iter.head] != ':' {
-		iter.ReportError("readObjectFieldAsBytes", "expect : after object field")
+		iter.ReportError("readObjectFieldAsBytes", "expect : after object field, but found "+string([]byte{iter.buf[iter.head]}))
 		return
 	}
 	iter.head++

vendor/github.com/json-iterator/go/feature_iter_skip.go

@@ -25,7 +25,7 @@ func (iter *Iterator) ReadBool() (ret bool) {
 		iter.skipFourBytes('a', 'l', 's', 'e')
 		return false
 	}
-	iter.ReportError("ReadBool", "expect t or f")
+	iter.ReportError("ReadBool", "expect t or f, but found "+string([]byte{c}))
 	return
 }
 
@@ -59,7 +59,9 @@ func (iter *Iterator) stopCapture() []byte {
 	iter.captureStartedAt = -1
 	iter.captured = nil
 	if len(captured) == 0 {
-		return remaining
+		copied := make([]byte, len(remaining))
+		copy(copied, remaining)
+		return copied
 	}
 	captured = append(captured, remaining...)
 	return captured

vendor/github.com/json-iterator/go/feature_iter_skip_sloppy.go

@@ -1,4 +1,4 @@
-//+build jsoniter-sloppy
+//+build jsoniter_sloppy
 
 package jsoniter
 

vendor/github.com/json-iterator/go/feature_iter_skip_strict.go

@@ -1,4 +1,4 @@
-//+build !jsoniter-sloppy
+//+build !jsoniter_sloppy
 
 package jsoniter
 
@@ -64,7 +64,7 @@ func (iter *Iterator) trySkipString() bool {
 		} else if c == '\\' {
 			return false
 		} else if c < ' ' {
-			iter.ReportError("ReadString",
+			iter.ReportError("trySkipString",
 				fmt.Sprintf(`invalid control character found: %d`, c))
 			return true // already failed
 		}

vendor/github.com/json-iterator/go/feature_iter_string.go

@@ -28,7 +28,7 @@ func (iter *Iterator) ReadString() (ret string) {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return ""
 	}
-	iter.ReportError("ReadString", `expects " or n`)
+	iter.ReportError("ReadString", `expects " or n, but found `+string([]byte{c}))
 	return
 }
 
@@ -47,7 +47,7 @@ func (iter *Iterator) readStringSlowPath() (ret string) {
 			str = append(str, c)
 		}
 	}
-	iter.ReportError("ReadString", "unexpected end of input")
+	iter.ReportError("readStringSlowPath", "unexpected end of input")
 	return
 }
 
@@ -104,7 +104,7 @@ func (iter *Iterator) readEscapedChar(c byte, str []byte) []byte {
 	case 't':
 		str = append(str, '\t')
 	default:
-		iter.ReportError("ReadString",
+		iter.ReportError("readEscapedChar",
 			`invalid escape char after \`)
 		return nil
 	}
@@ -139,7 +139,7 @@ func (iter *Iterator) ReadStringAsSlice() (ret []byte) {
 		}
 		return copied
 	}
-	iter.ReportError("ReadString", `expects " or n`)
+	iter.ReportError("ReadStringAsSlice", `expects " or n, but found `+string([]byte{c}))
 	return
 }
 
@@ -156,7 +156,7 @@ func (iter *Iterator) readU4() (ret rune) {
 		} else if c >= 'A' && c <= 'F' {
 			ret = ret*16 + rune(c-'A'+10)
 		} else {
-			iter.ReportError("readU4", "expects 0~9 or a~f")
+			iter.ReportError("readU4", "expects 0~9 or a~f, but found "+string([]byte{c}))
 			return
 		}
 	}

vendor/github.com/json-iterator/go/feature_json_number.go

@@ -1,9 +1,25 @@
 package jsoniter
 
-import "encoding/json"
+import (
+	"encoding/json"
+	"strconv"
+)
 
 type Number string
 
+// String returns the literal text of the number.
+func (n Number) String() string { return string(n) }
+
+// Float64 returns the number as a float64.
+func (n Number) Float64() (float64, error) {
+	return strconv.ParseFloat(string(n), 64)
+}
+
+// Int64 returns the number as an int64.
+func (n Number) Int64() (int64, error) {
+	return strconv.ParseInt(string(n), 10, 64)
+}
+
 func CastJsonNumber(val interface{}) (string, bool) {
 	switch typedVal := val.(type) {
 	case json.Number:

vendor/github.com/json-iterator/go/feature_pool.go

@@ -28,6 +28,7 @@ func (cfg *frozenConfig) BorrowStream(writer io.Writer) *Stream {
 
 func (cfg *frozenConfig) ReturnStream(stream *Stream) {
 	stream.Error = nil
+	stream.Attachment = nil
 	select {
 	case cfg.streamPool <- stream:
 		return
@@ -48,6 +49,7 @@ func (cfg *frozenConfig) BorrowIterator(data []byte) *Iterator {
 
 func (cfg *frozenConfig) ReturnIterator(iter *Iterator) {
 	iter.Error = nil
+	iter.Attachment = nil
 	select {
 	case cfg.iteratorPool <- iter:
 		return

vendor/github.com/json-iterator/go/feature_reflect.go

@@ -72,24 +72,24 @@ func init() {
 	textUnmarshalerType = reflect.TypeOf((*encoding.TextUnmarshaler)(nil)).Elem()
 }
 
-type optionalDecoder struct {
+type OptionalDecoder struct {
-	valueType    reflect.Type
+	ValueType    reflect.Type
-	valueDecoder ValDecoder
+	ValueDecoder ValDecoder
 }
 
-func (decoder *optionalDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+func (decoder *OptionalDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
 	if iter.ReadNil() {
 		*((*unsafe.Pointer)(ptr)) = nil
 	} else {
 		if *((*unsafe.Pointer)(ptr)) == nil {
 			//pointer to null, we have to allocate memory to hold the value
-			value := reflect.New(decoder.valueType)
+			value := reflect.New(decoder.ValueType)
 			newPtr := extractInterface(value.Interface()).word
-			decoder.valueDecoder.Decode(newPtr, iter)
+			decoder.ValueDecoder.Decode(newPtr, iter)
 			*((*uintptr)(ptr)) = uintptr(newPtr)
 		} else {
 			//reuse existing instance
-			decoder.valueDecoder.Decode(*((*unsafe.Pointer)(ptr)), iter)
+			decoder.ValueDecoder.Decode(*((*unsafe.Pointer)(ptr)), iter)
 		}
 	}
 }
@@ -113,11 +113,31 @@ func (decoder *deferenceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
 	}
 }
 
-type optionalEncoder struct {
+type OptionalEncoder struct {
+	ValueEncoder ValEncoder
+}
+
+func (encoder *OptionalEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	if *((*unsafe.Pointer)(ptr)) == nil {
+		stream.WriteNil()
+	} else {
+		encoder.ValueEncoder.Encode(*((*unsafe.Pointer)(ptr)), stream)
+	}
+}
+
+func (encoder *OptionalEncoder) EncodeInterface(val interface{}, stream *Stream) {
+	WriteToStream(val, stream, encoder)
+}
+
+func (encoder *OptionalEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*unsafe.Pointer)(ptr)) == nil
+}
+
+type optionalMapEncoder struct {
 	valueEncoder ValEncoder
 }
 
-func (encoder *optionalEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+func (encoder *optionalMapEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 	if *((*unsafe.Pointer)(ptr)) == nil {
 		stream.WriteNil()
 	} else {
@@ -125,15 +145,13 @@ func (encoder *optionalEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 	}
 }
 
-func (encoder *optionalEncoder) EncodeInterface(val interface{}, stream *Stream) {
+func (encoder *optionalMapEncoder) EncodeInterface(val interface{}, stream *Stream) {
 	WriteToStream(val, stream, encoder)
 }
 
-func (encoder *optionalEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+func (encoder *optionalMapEncoder) IsEmpty(ptr unsafe.Pointer) bool {
-	if *((*unsafe.Pointer)(ptr)) == nil {
+	p := *((*unsafe.Pointer)(ptr))
-		return true
+	return p == nil || encoder.valueEncoder.IsEmpty(p)
-	}
-	return false
 }
 
 type placeholderEncoder struct {
@@ -146,7 +164,7 @@ func (encoder *placeholderEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *placeholderEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	encoder.getRealEncoder().EncodeInterface(val, stream)
 }
 
 func (encoder *placeholderEncoder) IsEmpty(ptr unsafe.Pointer) bool {
@@ -154,11 +172,11 @@ func (encoder *placeholderEncoder) IsEmpty(ptr unsafe.Pointer) bool {
 }
 
 func (encoder *placeholderEncoder) getRealEncoder() ValEncoder {
-	for i := 0; i < 30; i++ {
+	for i := 0; i < 500; i++ {
 		realDecoder := encoder.cfg.getEncoderFromCache(encoder.cacheKey)
 		_, isPlaceholder := realDecoder.(*placeholderEncoder)
 		if isPlaceholder {
-			time.Sleep(time.Second)
+			time.Sleep(10 * time.Millisecond)
 		} else {
 			return realDecoder
 		}
@@ -172,11 +190,11 @@ type placeholderDecoder struct {
 }
 
 func (decoder *placeholderDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	for i := 0; i < 30; i++ {
+	for i := 0; i < 500; i++ {
 		realDecoder := decoder.cfg.getDecoderFromCache(decoder.cacheKey)
 		_, isPlaceholder := realDecoder.(*placeholderDecoder)
 		if isPlaceholder {
-			time.Sleep(time.Second)
+			time.Sleep(10 * time.Millisecond)
 		} else {
 			realDecoder.Decode(ptr, iter)
 			return
@@ -256,7 +274,7 @@ func decoderOfType(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
 	if decoder != nil {
 		return decoder, nil
 	}
-	decoder = getTypeDecoderFromExtension(typ)
+	decoder = getTypeDecoderFromExtension(cfg, typ)
 	if decoder != nil {
 		cfg.addDecoderToCache(cacheKey, decoder)
 		return decoder, nil
@@ -267,6 +285,9 @@ func decoderOfType(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
 	for _, extension := range extensions {
 		decoder = extension.DecorateDecoder(typ, decoder)
 	}
+	for _, extension := range cfg.extensions {
+		decoder = extension.DecorateDecoder(typ, decoder)
+	}
 	cfg.addDecoderToCache(cacheKey, decoder)
 	return decoder, err
 }
@@ -289,7 +310,7 @@ func createDecoderOfType(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error
 		templateInterface := reflect.New(typ).Elem().Interface()
 		var decoder ValDecoder = &unmarshalerDecoder{extractInterface(templateInterface)}
 		if typ.Kind() == reflect.Ptr {
-			decoder = &optionalDecoder{typ.Elem(), decoder}
+			decoder = &OptionalDecoder{typ.Elem(), decoder}
 		}
 		return decoder, nil
 	}
@@ -302,7 +323,7 @@ func createDecoderOfType(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error
 		templateInterface := reflect.New(typ).Elem().Interface()
 		var decoder ValDecoder = &textUnmarshalerDecoder{extractInterface(templateInterface)}
 		if typ.Kind() == reflect.Ptr {
-			decoder = &optionalDecoder{typ.Elem(), decoder}
+			decoder = &OptionalDecoder{typ.Elem(), decoder}
 		}
 		return decoder, nil
 	}
@@ -423,7 +444,7 @@ func encoderOfType(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
 	if encoder != nil {
 		return encoder, nil
 	}
-	encoder = getTypeEncoderFromExtension(typ)
+	encoder = getTypeEncoderFromExtension(cfg, typ)
 	if encoder != nil {
 		cfg.addEncoderToCache(cacheKey, encoder)
 		return encoder, nil
@@ -434,6 +455,9 @@ func encoderOfType(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
 	for _, extension := range extensions {
 		encoder = extension.DecorateEncoder(typ, encoder)
 	}
+	for _, extension := range cfg.extensions {
+		encoder = extension.DecorateEncoder(typ, encoder)
+	}
 	cfg.addEncoderToCache(cacheKey, encoder)
 	return encoder, err
 }
@@ -452,7 +476,7 @@ func createEncoderOfType(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error
 		return &jsoniterNumberCodec{}, nil
 	}
 	if typ.Implements(marshalerType) {
-		checkIsEmpty, err := createCheckIsEmpty(typ)
+		checkIsEmpty, err := createCheckIsEmpty(cfg, typ)
 		if err != nil {
 			return nil, err
 		}
@@ -462,12 +486,24 @@ func createEncoderOfType(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error
 			checkIsEmpty:      checkIsEmpty,
 		}
 		if typ.Kind() == reflect.Ptr {
-			encoder = &optionalEncoder{encoder}
+			encoder = &OptionalEncoder{encoder}
+		}
+		return encoder, nil
+	}
+	if reflect.PtrTo(typ).Implements(marshalerType) {
+		checkIsEmpty, err := createCheckIsEmpty(cfg, reflect.PtrTo(typ))
+		if err != nil {
+			return nil, err
+		}
+		templateInterface := reflect.New(typ).Interface()
+		var encoder ValEncoder = &marshalerEncoder{
+			templateInterface: extractInterface(templateInterface),
+			checkIsEmpty:      checkIsEmpty,
 		}
 		return encoder, nil
 	}
 	if typ.Implements(textMarshalerType) {
-		checkIsEmpty, err := createCheckIsEmpty(typ)
+		checkIsEmpty, err := createCheckIsEmpty(cfg, typ)
 		if err != nil {
 			return nil, err
 		}
@@ -477,7 +513,7 @@ func createEncoderOfType(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error
 			checkIsEmpty:      checkIsEmpty,
 		}
 		if typ.Kind() == reflect.Ptr {
-			encoder = &optionalEncoder{encoder}
+			encoder = &OptionalEncoder{encoder}
 		}
 		return encoder, nil
 	}
@@ -490,7 +526,7 @@ func createEncoderOfType(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error
 	return createEncoderOfSimpleType(cfg, typ)
 }
 
-func createCheckIsEmpty(typ reflect.Type) (checkIsEmpty, error) {
+func createCheckIsEmpty(cfg *frozenConfig, typ reflect.Type) (checkIsEmpty, error) {
 	kind := typ.Kind()
 	switch kind {
 	case reflect.String:
@@ -535,9 +571,9 @@ func createCheckIsEmpty(typ reflect.Type) (checkIsEmpty, error) {
 	case reflect.Slice:
 		return &sliceEncoder{}, nil
 	case reflect.Map:
-		return &mapEncoder{}, nil
+		return encoderOfMap(cfg, typ)
 	case reflect.Ptr:
-		return &optionalEncoder{}, nil
+		return &OptionalEncoder{}, nil
 	default:
 		return nil, fmt.Errorf("unsupported type: %v", typ)
 	}
@@ -648,7 +684,7 @@ func decoderOfOptional(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error)
 	if err != nil {
 		return nil, err
 	}
-	return &optionalDecoder{elemType, decoder}, nil
+	return &OptionalDecoder{elemType, decoder}, nil
 }
 
 func encoderOfOptional(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
@@ -657,9 +693,9 @@ func encoderOfOptional(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error)
 	if err != nil {
 		return nil, err
 	}
-	encoder := &optionalEncoder{elemEncoder}
+	encoder := &OptionalEncoder{elemEncoder}
 	if elemType.Kind() == reflect.Map {
-		encoder = &optionalEncoder{encoder}
+		encoder = &OptionalEncoder{encoder}
 	}
 	return encoder, nil
 }

vendor/github.com/json-iterator/go/feature_reflect_array.go

@@ -21,7 +21,7 @@ func encoderOfArray(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
 		return nil, err
 	}
 	if typ.Elem().Kind() == reflect.Map {
-		encoder = &optionalEncoder{encoder}
+		encoder = &OptionalEncoder{encoder}
 	}
 	return &arrayEncoder{typ, typ.Elem(), encoder}, nil
 }

vendor/github.com/json-iterator/go/feature_reflect_extension.go

@@ -161,22 +161,31 @@ func RegisterExtension(extension Extension) {
 	extensions = append(extensions, extension)
 }
 
-func getTypeDecoderFromExtension(typ reflect.Type) ValDecoder {
+func getTypeDecoderFromExtension(cfg *frozenConfig, typ reflect.Type) ValDecoder {
-	decoder := _getTypeDecoderFromExtension(typ)
+	decoder := _getTypeDecoderFromExtension(cfg, typ)
 	if decoder != nil {
 		for _, extension := range extensions {
 			decoder = extension.DecorateDecoder(typ, decoder)
 		}
+		for _, extension := range cfg.extensions {
+			decoder = extension.DecorateDecoder(typ, decoder)
+		}
 	}
 	return decoder
 }
-func _getTypeDecoderFromExtension(typ reflect.Type) ValDecoder {
+func _getTypeDecoderFromExtension(cfg *frozenConfig, typ reflect.Type) ValDecoder {
 	for _, extension := range extensions {
 		decoder := extension.CreateDecoder(typ)
 		if decoder != nil {
 			return decoder
 		}
 	}
+	for _, extension := range cfg.extensions {
+		decoder := extension.CreateDecoder(typ)
+		if decoder != nil {
+			return decoder
+		}
+	}
 	typeName := typ.String()
 	decoder := typeDecoders[typeName]
 	if decoder != nil {
@@ -185,29 +194,38 @@ func _getTypeDecoderFromExtension(typ reflect.Type) ValDecoder {
 	if typ.Kind() == reflect.Ptr {
 		decoder := typeDecoders[typ.Elem().String()]
 		if decoder != nil {
-			return &optionalDecoder{typ.Elem(), decoder}
+			return &OptionalDecoder{typ.Elem(), decoder}
 		}
 	}
 	return nil
 }
 
-func getTypeEncoderFromExtension(typ reflect.Type) ValEncoder {
+func getTypeEncoderFromExtension(cfg *frozenConfig, typ reflect.Type) ValEncoder {
-	encoder := _getTypeEncoderFromExtension(typ)
+	encoder := _getTypeEncoderFromExtension(cfg, typ)
 	if encoder != nil {
 		for _, extension := range extensions {
 			encoder = extension.DecorateEncoder(typ, encoder)
 		}
+		for _, extension := range cfg.extensions {
+			encoder = extension.DecorateEncoder(typ, encoder)
+		}
 	}
 	return encoder
 }
 
-func _getTypeEncoderFromExtension(typ reflect.Type) ValEncoder {
+func _getTypeEncoderFromExtension(cfg *frozenConfig, typ reflect.Type) ValEncoder {
 	for _, extension := range extensions {
 		encoder := extension.CreateEncoder(typ)
 		if encoder != nil {
 			return encoder
 		}
 	}
+	for _, extension := range cfg.extensions {
+		encoder := extension.CreateEncoder(typ)
+		if encoder != nil {
+			return encoder
+		}
+	}
 	typeName := typ.String()
 	encoder := typeEncoders[typeName]
 	if encoder != nil {
@@ -216,7 +234,7 @@ func _getTypeEncoderFromExtension(typ reflect.Type) ValEncoder {
 	if typ.Kind() == reflect.Ptr {
 		encoder := typeEncoders[typ.Elem().String()]
 		if encoder != nil {
-			return &optionalEncoder{encoder}
+			return &OptionalEncoder{encoder}
 		}
 	}
 	return nil
@@ -254,7 +272,7 @@ func describeStruct(cfg *frozenConfig, typ reflect.Type) (*StructDescriptor, err
 				for _, binding := range structDescriptor.Fields {
 					binding.levels = append([]int{i}, binding.levels...)
 					omitempty := binding.Encoder.(*structFieldEncoder).omitempty
-					binding.Encoder = &optionalEncoder{binding.Encoder}
+					binding.Encoder = &OptionalEncoder{binding.Encoder}
 					binding.Encoder = &structFieldEncoder{&field, binding.Encoder, omitempty}
 					binding.Decoder = &deferenceDecoder{field.Type.Elem(), binding.Decoder}
 					binding.Decoder = &structFieldDecoder{&field, binding.Decoder}
@@ -269,7 +287,7 @@ func describeStruct(cfg *frozenConfig, typ reflect.Type) (*StructDescriptor, err
 		if decoder == nil {
 			var err error
 			decoder, err = decoderOfType(cfg, field.Type)
-			if err != nil {
+			if len(fieldNames) > 0 && err != nil {
 				return nil, err
 			}
 		}
@@ -277,12 +295,13 @@ func describeStruct(cfg *frozenConfig, typ reflect.Type) (*StructDescriptor, err
 		if encoder == nil {
 			var err error
 			encoder, err = encoderOfType(cfg, field.Type)
-			if err != nil {
+			if len(fieldNames) > 0 && err != nil {
 				return nil, err
 			}
-			// map is stored as pointer in the struct
+			// map is stored as pointer in the struct,
-			if field.Type.Kind() == reflect.Map {
+			// and treat nil or empty map as empty field
-				encoder = &optionalEncoder{encoder}
+			if encoder != nil && field.Type.Kind() == reflect.Map {
+				encoder = &optionalMapEncoder{encoder}
 			}
 		}
 		binding := &Binding{
@@ -323,6 +342,9 @@ func createStructDescriptor(cfg *frozenConfig, typ reflect.Type, bindings []*Bin
 	for _, extension := range extensions {
 		extension.UpdateStructDescriptor(structDescriptor)
 	}
+	for _, extension := range cfg.extensions {
+		extension.UpdateStructDescriptor(structDescriptor)
+	}
 	processTags(structDescriptor, cfg)
 	// merge normal & embedded bindings & sort with original order
 	allBindings := sortableBindings(append(embeddedBindings, structDescriptor.Fields...))

vendor/github.com/json-iterator/go/feature_reflect_native.go

@@ -4,6 +4,7 @@ import (
 	"encoding"
 	"encoding/base64"
 	"encoding/json"
+	"reflect"
 	"unsafe"
 )
 
@@ -31,7 +32,9 @@ type intCodec struct {
 }
 
 func (codec *intCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*int)(ptr)) = iter.ReadInt()
+	}
 }
 
 func (codec *intCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -50,7 +53,9 @@ type uintptrCodec struct {
 }
 
 func (codec *uintptrCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*uintptr)(ptr)) = uintptr(iter.ReadUint64())
+	}
 }
 
 func (codec *uintptrCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -69,7 +74,9 @@ type int8Codec struct {
 }
 
 func (codec *int8Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*int8)(ptr)) = iter.ReadInt8()
+	}
 }
 
 func (codec *int8Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -88,7 +95,9 @@ type int16Codec struct {
 }
 
 func (codec *int16Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*int16)(ptr)) = iter.ReadInt16()
+	}
 }
 
 func (codec *int16Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -107,7 +116,9 @@ type int32Codec struct {
 }
 
 func (codec *int32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*int32)(ptr)) = iter.ReadInt32()
+	}
 }
 
 func (codec *int32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -126,7 +137,9 @@ type int64Codec struct {
 }
 
 func (codec *int64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*int64)(ptr)) = iter.ReadInt64()
+	}
 }
 
 func (codec *int64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -145,7 +158,10 @@ type uintCodec struct {
 }
 
 func (codec *uintCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*uint)(ptr)) = iter.ReadUint()
+		return
+	}
 }
 
 func (codec *uintCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -164,7 +180,9 @@ type uint8Codec struct {
 }
 
 func (codec *uint8Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*uint8)(ptr)) = iter.ReadUint8()
+	}
 }
 
 func (codec *uint8Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -183,7 +201,9 @@ type uint16Codec struct {
 }
 
 func (codec *uint16Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*uint16)(ptr)) = iter.ReadUint16()
+	}
 }
 
 func (codec *uint16Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -202,7 +222,9 @@ type uint32Codec struct {
 }
 
 func (codec *uint32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*uint32)(ptr)) = iter.ReadUint32()
+	}
 }
 
 func (codec *uint32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -221,7 +243,9 @@ type uint64Codec struct {
 }
 
 func (codec *uint64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*uint64)(ptr)) = iter.ReadUint64()
+	}
 }
 
 func (codec *uint64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -240,7 +264,9 @@ type float32Codec struct {
 }
 
 func (codec *float32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*float32)(ptr)) = iter.ReadFloat32()
+	}
 }
 
 func (codec *float32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -259,7 +285,9 @@ type float64Codec struct {
 }
 
 func (codec *float64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*float64)(ptr)) = iter.ReadFloat64()
+	}
 }
 
 func (codec *float64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -278,7 +306,9 @@ type boolCodec struct {
 }
 
 func (codec *boolCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
 		*((*bool)(ptr)) = iter.ReadBool()
+	}
 }
 
 func (codec *boolCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -297,7 +327,42 @@ type emptyInterfaceCodec struct {
 }
 
 func (codec *emptyInterfaceCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	existing := *((*interface{})(ptr))
+
+	// Checking for both typed and untyped nil pointers.
+	if existing != nil &&
+		reflect.TypeOf(existing).Kind() == reflect.Ptr &&
+		!reflect.ValueOf(existing).IsNil() {
+
+		var ptrToExisting interface{}
+		for {
+			elem := reflect.ValueOf(existing).Elem()
+			if elem.Kind() != reflect.Ptr || elem.IsNil() {
+				break
+			}
+			ptrToExisting = existing
+			existing = elem.Interface()
+		}
+
+		if iter.ReadNil() {
+			if ptrToExisting != nil {
+				nilPtr := reflect.Zero(reflect.TypeOf(ptrToExisting).Elem())
+				reflect.ValueOf(ptrToExisting).Elem().Set(nilPtr)
+			} else {
+				*((*interface{})(ptr)) = nil
+			}
+		} else {
+			iter.ReadVal(existing)
+		}
+
+		return
+	}
+
+	if iter.ReadNil() {
+		*((*interface{})(ptr)) = nil
+	} else {
 		*((*interface{})(ptr)) = iter.Read()
+	}
 }
 
 func (codec *emptyInterfaceCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -309,7 +374,8 @@ func (codec *emptyInterfaceCodec) EncodeInterface(val interface{}, stream *Strea
 }
 
 func (codec *emptyInterfaceCodec) IsEmpty(ptr unsafe.Pointer) bool {
-	return ptr == nil
+	emptyInterface := (*emptyInterface)(ptr)
+	return emptyInterface.typ == nil
 }
 
 type nonEmptyInterfaceCodec struct {
@@ -326,15 +392,20 @@ func (codec *nonEmptyInterfaceCodec) Decode(ptr unsafe.Pointer, iter *Iterator)
 	e.typ = nonEmptyInterface.itab.typ
 	e.word = nonEmptyInterface.word
 	iter.ReadVal(&i)
+	if e.word == nil {
+		nonEmptyInterface.itab = nil
+	}
 	nonEmptyInterface.word = e.word
 }
 
 func (codec *nonEmptyInterfaceCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	nonEmptyInterface := (*nonEmptyInterface)(ptr)
 	var i interface{}
+	if nonEmptyInterface.itab != nil {
 		e := (*emptyInterface)(unsafe.Pointer(&i))
 		e.typ = nonEmptyInterface.itab.typ
 		e.word = nonEmptyInterface.word
+	}
 	stream.WriteVal(i)
 }
 
@@ -370,7 +441,15 @@ type jsonNumberCodec struct {
 }
 
 func (codec *jsonNumberCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	switch iter.WhatIsNext() {
+	case StringValue:
+		*((*json.Number)(ptr)) = json.Number(iter.ReadString())
+	case NilValue:
+		iter.skipFourBytes('n', 'u', 'l', 'l')
+		*((*json.Number)(ptr)) = ""
+	default:
 		*((*json.Number)(ptr)) = json.Number([]byte(iter.readNumberAsString()))
+	}
 }
 
 func (codec *jsonNumberCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -389,7 +468,15 @@ type jsoniterNumberCodec struct {
 }
 
 func (codec *jsoniterNumberCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	switch iter.WhatIsNext() {
+	case StringValue:
+		*((*Number)(ptr)) = Number(iter.ReadString())
+	case NilValue:
+		iter.skipFourBytes('n', 'u', 'l', 'l')
+		*((*Number)(ptr)) = ""
+	default:
 		*((*Number)(ptr)) = Number([]byte(iter.readNumberAsString()))
+	}
 }
 
 func (codec *jsoniterNumberCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -521,7 +608,7 @@ type stringModeNumberDecoder struct {
 func (decoder *stringModeNumberDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
 	c := iter.nextToken()
 	if c != '"' {
-		iter.ReportError("stringModeNumberDecoder", `expect "`)
+		iter.ReportError("stringModeNumberDecoder", `expect ", but found `+string([]byte{c}))
 		return
 	}
 	decoder.elemDecoder.Decode(ptr, iter)
@@ -530,7 +617,7 @@ func (decoder *stringModeNumberDecoder) Decode(ptr unsafe.Pointer, iter *Iterato
 	}
 	c = iter.readByte()
 	if c != '"' {
-		iter.ReportError("stringModeNumberDecoder", `expect "`)
+		iter.ReportError("stringModeNumberDecoder", `expect ", but found `+string([]byte{c}))
 		return
 	}
 }
@@ -595,7 +682,12 @@ func (encoder *marshalerEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 	templateInterface := encoder.templateInterface
 	templateInterface.word = ptr
 	realInterface := (*interface{})(unsafe.Pointer(&templateInterface))
-	marshaler := (*realInterface).(json.Marshaler)
+	marshaler, ok := (*realInterface).(json.Marshaler)
+	if !ok {
+		stream.WriteVal(nil)
+		return
+	}
+
 	bytes, err := marshaler.MarshalJSON()
 	if err != nil {
 		stream.Error = err

vendor/github.com/json-iterator/go/feature_reflect_slice.go

@@ -21,7 +21,7 @@ func encoderOfSlice(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
 		return nil, err
 	}
 	if typ.Elem().Kind() == reflect.Map {
-		encoder = &optionalEncoder{encoder}
+		encoder = &OptionalEncoder{encoder}
 	}
 	return &sliceEncoder{typ, typ.Elem(), encoder}, nil
 }
@@ -127,12 +127,10 @@ func growOne(slice *sliceHeader, sliceType reflect.Type, elementType reflect.Typ
 	newVal := reflect.MakeSlice(sliceType, newLen, newCap)
 	dst := unsafe.Pointer(newVal.Pointer())
 	// copy old array into new array
-	originalBytesCount := uintptr(slice.Len) * elementType.Size()
+	originalBytesCount := slice.Len * int(elementType.Size())
-	srcPtr := (*[1 << 30]byte)(slice.Data)
+	srcSliceHeader := (unsafe.Pointer)(&sliceHeader{slice.Data, originalBytesCount, originalBytesCount})
-	dstPtr := (*[1 << 30]byte)(dst)
+	dstSliceHeader := (unsafe.Pointer)(&sliceHeader{dst, originalBytesCount, originalBytesCount})
-	for i := uintptr(0); i < originalBytesCount; i++ {
+	copy(*(*[]byte)(dstSliceHeader), *(*[]byte)(srcSliceHeader))
-		dstPtr[i] = srcPtr[i]
-	}
 	slice.Data = dst
 	slice.Len = newLen
 	slice.Cap = newCap

vendor/github.com/json-iterator/go/feature_reflect_struct_decoder.go

@@ -427,8 +427,18 @@ func (decoder *generalStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator)
 	if !iter.readObjectStart() {
 		return
 	}
-	fieldBytes := iter.readObjectFieldAsBytes()
+	var fieldBytes []byte
-	field := *(*string)(unsafe.Pointer(&fieldBytes))
+	var field string
+	if iter.cfg.objectFieldMustBeSimpleString {
+		fieldBytes = iter.readObjectFieldAsBytes()
+		field = *(*string)(unsafe.Pointer(&fieldBytes))
+	} else {
+		field = iter.ReadString()
+		c := iter.nextToken()
+		if c != ':' {
+			iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+		}
+	}
 	fieldDecoder := decoder.fields[strings.ToLower(field)]
 	if fieldDecoder == nil {
 		iter.Skip()
@@ -436,8 +446,16 @@ func (decoder *generalStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator)
 		fieldDecoder.Decode(ptr, iter)
 	}
 	for iter.nextToken() == ',' {
-		fieldBytes = iter.readObjectFieldAsBytes()
+		if iter.cfg.objectFieldMustBeSimpleString {
+			fieldBytes := iter.readObjectFieldAsBytes()
 			field = *(*string)(unsafe.Pointer(&fieldBytes))
+		} else {
+			field = iter.ReadString()
+			c := iter.nextToken()
+			if c != ':' {
+				iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+			}
+		}
 		fieldDecoder = decoder.fields[strings.ToLower(field)]
 		if fieldDecoder == nil {
 			iter.Skip()

vendor/github.com/json-iterator/go/feature_stream.go

@@ -4,7 +4,7 @@ import (
 	"io"
 )
 
-// Stream is a io.Writer like object, with JSON specific write functions.
+// stream is a io.Writer like object, with JSON specific write functions.
 // Error is not returned as return value, but stored as Error member on this stream instance.
 type Stream struct {
 	cfg        *frozenConfig
@@ -13,6 +13,7 @@ type Stream struct {
 	n          int
 	Error      error
 	indention  int
+	Attachment interface{} // open for customized encoder
 }
 
 // NewStream create new stream instance.
@@ -191,6 +192,9 @@ func (stream *Stream) ensure(minimal int) {
 func (stream *Stream) growAtLeast(minimal int) {
 	if stream.out != nil {
 		stream.Flush()
+		if stream.Available() >= minimal {
+			return
+		}
 	}
 	toGrow := len(stream.buf)
 	if toGrow < minimal {
@@ -280,8 +284,7 @@ func (stream *Stream) WriteArrayStart() {
 
 // WriteEmptyArray write []
 func (stream *Stream) WriteEmptyArray() {
-	stream.writeByte('[')
+	stream.writeTwoBytes('[', ']')
-	stream.writeByte(']')
 }
 
 // WriteArrayEnd write ] with possible indention