Merge branch 'renovate/github.com-olivere-elastic-v7-7.x' into 'master'

Update module olivere/elastic/v7 to v7.0.22

See merge request !3

go.mod

@@ -4,4 +4,4 @@ go 1.11
 
 // go: no requirements found in vendor/vendor.json
 
-require github.com/olivere/elastic/v7 v7.0.19
+require github.com/olivere/elastic/v7 v7.0.22

go.sum

 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/aws/aws-sdk-go v1.33.5/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
+github.com/aws/aws-sdk-go v1.35.20/go.mod h1:tlPOdRjfxPBpNIwqDj61rmsnA85v9jc0Ps9+muhnW+k=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/fortytw2/leaktest v1.3.0 h1:u8491cBMTQ8ft8aeV+adlcytMZylmA5nnwwkRZjI8vw=
@@ -14,11 +15,20 @@ github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.5.0 h1:/QaMHBdZ26BB3SSst0Iwl10Epc+xhTquomWX0oZEB6w=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/jmespath/go-jmespath v0.3.0/go.mod h1:9QtRXoHjLGCJ5IBSaohpXITPlowMeeYCZ7fLUTSywik=
+github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHWvzYPziyZiYoo=
+github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfCI6z80xFu9LTZmf1ZRjMHUOPmWr69U=
+github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
+github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
 github.com/mailru/easyjson v0.7.1 h1:mdxE1MF9o53iCb2Ghj1VfWvh7ZOwHpnVG/xwXrV90U8=
 github.com/mailru/easyjson v0.7.1/go.mod h1:KAzv3t3aY1NaHWoQz1+4F1ccyAH66Jk7yos7ldAVICs=
+github.com/mailru/easyjson v0.7.6 h1:8yTIVnZgCoiM1TgqoeTl+LfU5Jg6/xL3QhGQnimLYnA=
+github.com/mailru/easyjson v0.7.6/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
 github.com/olivere/elastic/v7 v7.0.19 h1:w4F6JpqOISadhYf/n0NR1cNj73xHqh4pzPwD1Gkidts=
 github.com/olivere/elastic/v7 v7.0.19/go.mod h1:4Jqt5xvjqpjCqgnTcHwl3j8TLs8mvoOK8NYgo/qEOu4=
+github.com/olivere/elastic/v7 v7.0.22 h1:esBA6JJwvYgfms0EVlH7Z+9J4oQ/WUADF2y/nCNDw7s=
+github.com/olivere/elastic/v7 v7.0.22/go.mod h1:VDexNy9NjmtAkrjNoI7tImv7FR4tf5zUA3ickqu5Pc8=
 github.com/opentracing/opentracing-go v1.2.0/go.mod h1:GxEUsuufX4nBwe+T+Wl9TAgYrxe9dPLANfrWvHYVTgc=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -26,11 +36,13 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/smartystreets/assertions v1.1.1/go.mod h1:tcbTF8ujkAEcZ8TElKY+i30BzYlVhC/LOxJk7iOWnoo=
 github.com/smartystreets/go-aws-auth v0.0.0-20180515143844-0c1422d1fdb9/go.mod h1:SnhjPscd9TpLiy1LpzGSKh3bXCfxxXuqd9xmQJy3slM=
 github.com/smartystreets/gunit v1.3.4/go.mod h1:ZjM1ozSIMJlAz/ay4SG8PeKF00ckUp+zMHZXV9/bvak=
+github.com/smartystreets/gunit v1.4.2/go.mod h1:ZjM1ozSIMJlAz/ay4SG8PeKF00ckUp+zMHZXV9/bvak=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
+go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
@@ -51,6 +63,7 @@ golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
@@ -65,4 +78,5 @@ google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZi
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

vendor/github.com/josharian/intern/README.md

+Docs: https://godoc.org/github.com/josharian/intern
+
+See also [Go issue 5160](https://golang.org/issue/5160).
+
+License: MIT

vendor/github.com/josharian/intern/go.mod

+module github.com/josharian/intern
+
+go 1.5

vendor/github.com/josharian/intern/intern.go

+// Package intern interns strings.
+// Interning is best effort only.
+// Interned strings may be removed automatically
+// at any time without notification.
+// All functions may be called concurrently
+// with themselves and each other.
+package intern
+
+import "sync"
+
+var (
+	pool sync.Pool = sync.Pool{
+		New: func() interface{} {
+			return make(map[string]string)
+		},
+	}
+)
+
+// String returns s, interned.
+func String(s string) string {
+	m := pool.Get().(map[string]string)
+	c, ok := m[s]
+	if ok {
+		pool.Put(m)
+		return c
+	}
+	m[s] = s
+	pool.Put(m)
+	return s
+}
+
+// Bytes returns b converted to a string, interned.
+func Bytes(b []byte) string {
+	m := pool.Get().(map[string]string)
+	c, ok := m[string(b)]
+	if ok {
+		pool.Put(m)
+		return c
+	}
+	s := string(b)
+	m[s] = s
+	pool.Put(m)
+	return s
+}

vendor/github.com/josharian/intern/license.md

+MIT License
+
+Copyright (c) 2019 Josh Bleecher Snyder
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/mailru/easyjson/Makefile

@@ -20,22 +20,38 @@ generate: build
 		./tests/reference_to_pointer.go \
 		./tests/html.go \
 		./tests/unknown_fields.go \
-
-	bin/easyjson -all ./tests/data.go
-	bin/easyjson -all ./tests/nothing.go
-	bin/easyjson -all ./tests/errors.go
-	bin/easyjson -all ./tests/html.go
+		./tests/type_declaration.go \
+		./tests/type_declaration_skip.go \
+		./tests/members_escaped.go \
+		./tests/members_unescaped.go \
+		./tests/intern.go \
+		./tests/nocopy.go \
+		./tests/escaping.go
+	bin/easyjson -all \
+		./tests/data.go \
+ 		./tests/nothing.go \
+ 		./tests/errors.go \
+ 		./tests/html.go \
+ 		./tests/type_declaration_skip.go
+	bin/easyjson \
+		./tests/nested_easy.go \
+		./tests/named_type.go \
+		./tests/custom_map_key_type.go \
+		./tests/embedded_type.go \
+		./tests/reference_to_pointer.go \
+		./tests/key_marshaler_map.go \
+		./tests/unknown_fields.go \
+		./tests/type_declaration.go \
+		./tests/members_escaped.go \
+		./tests/intern.go \
+		./tests/nocopy.go \
+		./tests/escaping.go \
+		./tests/nested_marshaler.go
 	bin/easyjson -snake_case ./tests/snake.go
 	bin/easyjson -omit_empty ./tests/omitempty.go
-	bin/easyjson -build_tags=use_easyjson ./benchmark/data.go
-	bin/easyjson ./tests/nested_easy.go
-	bin/easyjson ./tests/named_type.go
-	bin/easyjson ./tests/custom_map_key_type.go
-	bin/easyjson ./tests/embedded_type.go
-	bin/easyjson ./tests/reference_to_pointer.go
-	bin/easyjson ./tests/key_marshaler_map.go
+	bin/easyjson -build_tags=use_easyjson -disable_members_unescape ./benchmark/data.go
 	bin/easyjson -disallow_unknown_fields ./tests/disallow_unknown.go
-	bin/easyjson ./tests/unknown_fields.go
+	bin/easyjson -disable_members_unescape ./tests/members_unescaped.go
 
 test: generate
 	go test \

vendor/github.com/mailru/easyjson/README.md

@@ -34,7 +34,11 @@ Usage of easyjson:
   -all
     	generate marshaler/unmarshalers for all structs in a file
   -build_tags string
-    	build tags to add to generated file
+        build tags to add to generated file
+  -gen_build_flags string
+        build flags when running the generator while bootstrapping
+  -byte
+        use simple bytes instead of Base64Bytes for slice of bytes
   -leave_temps
     	do not delete temporary files
   -no_std_marshalers
@@ -55,10 +59,20 @@ Usage of easyjson:
     	only generate stubs for marshaler/unmarshaler funcs
   -disallow_unknown_fields
         return error if some unknown field in json appeared
+  -disable_members_unescape
+        disable unescaping of \uXXXX string sequences in member names
 ```
 
 Using `-all` will generate marshalers/unmarshalers for all Go structs in the
-file. If `-all` is not provided, then only those structs whose preceding
+file excluding those structs whose preceding comment starts with `easyjson:skip`.
+For example: 
+
+```go
+//easyjson:skip
+type A struct {}
+```
+
+If `-all` is not provided, then only those structs whose preceding
 comment starts with `easyjson:json` will have marshalers/unmarshalers
 generated. For example:
 
@@ -76,10 +90,26 @@ Additional option notes:
 
 * `-build_tags` will add the specified build tags to generated Go sources.
 
+* `-gen_build_flags` will execute the easyjson bootstapping code to launch the 
+  actual generator command with provided flags. Multiple arguments should be
+  separated by space e.g. `-gen_build_flags="-mod=mod -x"`.
+
+## Structure json tag options
+
+Besides standart json tag options like 'omitempty' the following are supported:
+
+* 'nocopy' - disables allocation and copying of string values, making them
+  refer to original json buffer memory. This works great for short lived
+  objects which are not hold in memory after decoding and immediate usage.
+  Note if string requires unescaping it will be processed as normally.
+* 'intern' - string "interning" (deduplication) to save memory when the very
+  same string dictionary values are often met all over the structure.
+  See below for more details.
+
 ## Generated Marshaler/Unmarshaler Funcs
 
 For Go struct types, easyjson generates the funcs `MarshalEasyJSON` /
-`UnmarshalEasyJSON` for marshaling/unmarshaling JSON. In turn, these satisify
+`UnmarshalEasyJSON` for marshaling/unmarshaling JSON. In turn, these satisfy
 the `easyjson.Marshaler` and `easyjson.Unmarshaler` interfaces and when used in
 conjunction with `easyjson.Marshal` / `easyjson.Unmarshal` avoid unnecessary
 reflection / type assertions during marshaling/unmarshaling to/from JSON for Go
@@ -102,17 +132,17 @@ utility funcs that are available.
 ## Controlling easyjson Marshaling and Unmarshaling Behavior
 
 Go types can provide their own `MarshalEasyJSON` and `UnmarshalEasyJSON` funcs
-that satisify the `easyjson.Marshaler` / `easyjson.Unmarshaler` interfaces.
+that satisfy the `easyjson.Marshaler` / `easyjson.Unmarshaler` interfaces.
 These will be used by `easyjson.Marshal` and `easyjson.Unmarshal` when defined
 for a Go type.
 
-Go types can also satisify the `easyjson.Optional` interface, which allows the
+Go types can also satisfy the `easyjson.Optional` interface, which allows the
 type to define its own `omitempty` logic.
 
 ## Type Wrappers
 
 easyjson provides additional type wrappers defined in the `easyjson/opt`
-package. These wrap the standard Go primitives and in turn satisify the
+package. These wrap the standard Go primitives and in turn satisfy the
 easyjson interfaces.
 
 The `easyjson/opt` type wrappers are useful when needing to distinguish between
@@ -133,6 +163,27 @@ through a call to `buffer.Init()` prior to any marshaling or unmarshaling.
 Please see the [GoDoc listing](https://godoc.org/github.com/mailru/easyjson/buffer)
 for more information.
 
+## String interning
+
+During unmarshaling, `string` field values can be optionally
+[interned](https://en.wikipedia.org/wiki/String_interning) to reduce memory
+allocations and usage by deduplicating strings in memory, at the expense of slightly
+increased CPU usage.
+
+This will work effectively only for `string` fields being decoded that have frequently
+the same value (e.g. if you have a string field that can only assume a small number
+of possible values).
+
+To enable string interning, add the `intern` keyword tag to your `json` tag on `string`
+fields, e.g.:
+
+```go
+type Foo struct {
+  UUID  string `json:"uuid"`         // will not be interned during unmarshaling
+  State string `json:"state,intern"` // will be interned during unmarshaling
+}
+```
+
 ## Issues, Notes, and Limitations
 
 * easyjson is still early in its development. As such, there are likely to be
@@ -174,7 +225,7 @@ for more information.
   needs to be known prior to sending the data. Currently this is not possible
   with easyjson's architecture.
   
-* easyjson parser and codegen based on reflection, so it wont works on `package main` 
+* easyjson parser and codegen based on reflection, so it won't work on `package main` 
   files, because they cant be imported by parser.
 
 ## Benchmarks
@@ -239,7 +290,7 @@ since the memory is not freed between marshaling operations.
 ### easyjson vs 'ujson' python module
 
 [ujson](https://github.com/esnme/ultrajson) is using C code for parsing, so it
-is interesting to see how plain golang compares to that. It is imporant to note
+is interesting to see how plain golang compares to that. It is important to note
 that the resulting object for python is slower to access, since the library
 parses JSON object into dictionaries.
 

vendor/github.com/mailru/easyjson/buffer/pool.go

@@ -4,6 +4,7 @@ package buffer
 
 import (
 	"io"
+	"net"
 	"sync"
 )
 
@@ -52,14 +53,12 @@ func putBuf(buf []byte) {
 
 // getBuf gets a chunk from reuse pool or creates a new one if reuse failed.
 func getBuf(size int) []byte {
-	if size < config.PooledSize {
-		return make([]byte, 0, size)
-	}
-
-	if c := buffers[size]; c != nil {
-		v := c.Get()
-		if v != nil {
-			return v.([]byte)
+	if size >= config.PooledSize {
+		if c := buffers[size]; c != nil {
+			v := c.Get()
+			if v != nil {
+				return v.([]byte)
+			}
 		}
 	}
 	return make([]byte, 0, size)
@@ -78,9 +77,12 @@ type Buffer struct {
 // EnsureSpace makes sure that the current chunk contains at least s free bytes,
 // possibly creating a new chunk.
 func (b *Buffer) EnsureSpace(s int) {
-	if cap(b.Buf)-len(b.Buf) >= s {
-		return
+	if cap(b.Buf)-len(b.Buf) < s {
+		b.ensureSpaceSlow(s)
 	}
+}
+
+func (b *Buffer) ensureSpaceSlow(s int) {
 	l := len(b.Buf)
 	if l > 0 {
 		if cap(b.toPool) != cap(b.Buf) {
@@ -105,18 +107,22 @@ func (b *Buffer) EnsureSpace(s int) {
 
 // AppendByte appends a single byte to buffer.
 func (b *Buffer) AppendByte(data byte) {
-	if cap(b.Buf) == len(b.Buf) { // EnsureSpace won't be inlined.
-		b.EnsureSpace(1)
-	}
+	b.EnsureSpace(1)
 	b.Buf = append(b.Buf, data)
 }
 
 // AppendBytes appends a byte slice to buffer.
 func (b *Buffer) AppendBytes(data []byte) {
+	if len(data) <= cap(b.Buf)-len(b.Buf) {
+		b.Buf = append(b.Buf, data...) // fast path
+	} else {
+		b.appendBytesSlow(data)
+	}
+}
+
+func (b *Buffer) appendBytesSlow(data []byte) {
 	for len(data) > 0 {
-		if cap(b.Buf) == len(b.Buf) { // EnsureSpace won't be inlined.
-			b.EnsureSpace(1)
-		}
+		b.EnsureSpace(1)
 
 		sz := cap(b.Buf) - len(b.Buf)
 		if sz > len(data) {
@@ -128,12 +134,18 @@ func (b *Buffer) AppendBytes(data []byte) {
 	}
 }
 
-// AppendBytes appends a string to buffer.
+// AppendString appends a string to buffer.
 func (b *Buffer) AppendString(data string) {
+	if len(data) <= cap(b.Buf)-len(b.Buf) {
+		b.Buf = append(b.Buf, data...) // fast path
+	} else {
+		b.appendStringSlow(data)
+	}
+}
+
+func (b *Buffer) appendStringSlow(data string) {
 	for len(data) > 0 {
-		if cap(b.Buf) == len(b.Buf) { // EnsureSpace won't be inlined.
-			b.EnsureSpace(1)
-		}
+		b.EnsureSpace(1)
 
 		sz := cap(b.Buf) - len(b.Buf)
 		if sz > len(data) {
@@ -156,18 +168,14 @@ func (b *Buffer) Size() int {
 
 // DumpTo outputs the contents of a buffer to a writer and resets the buffer.
 func (b *Buffer) DumpTo(w io.Writer) (written int, err error) {
-	var n int
-	for _, buf := range b.bufs {
-		if err == nil {
-			n, err = w.Write(buf)
-			written += n
-		}
-		putBuf(buf)
+	bufs := net.Buffers(b.bufs)
+	if len(b.Buf) > 0 {
+		bufs = append(bufs, b.Buf)
 	}
+	n, err := bufs.WriteTo(w)
 
-	if err == nil {
-		n, err = w.Write(b.Buf)
-		written += n
+	for _, buf := range b.bufs {
+		putBuf(buf)
 	}
 	putBuf(b.toPool)
 
@@ -175,7 +183,7 @@ func (b *Buffer) DumpTo(w io.Writer) (written int, err error) {
 	b.Buf = nil
 	b.toPool = nil
 
-	return
+	return int(n), err
 }
 
 // BuildBytes creates a single byte slice with all the contents of the buffer. Data is
@@ -192,7 +200,7 @@ func (b *Buffer) BuildBytes(reuse ...[]byte) []byte {
 	var ret []byte
 	size := b.Size()
 
-	// If we got a buffer as argument and it is big enought, reuse it.
+	// If we got a buffer as argument and it is big enough, reuse it.
 	if len(reuse) == 1 && cap(reuse[0]) >= size {
 		ret = reuse[0][:0]
 	} else {

vendor/github.com/mailru/easyjson/go.mod

 module github.com/mailru/easyjson
 
 go 1.12
+
+require github.com/josharian/intern v1.0.0

vendor/github.com/mailru/easyjson/go.sum

+github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
+github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=

vendor/github.com/mailru/easyjson/helpers.go

@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"net/http"
 	"strconv"
+	"unsafe"
 
 	"github.com/mailru/easyjson/jlexer"
 	"github.com/mailru/easyjson/jwriter"
@@ -21,6 +22,12 @@ type Unmarshaler interface {
 	UnmarshalEasyJSON(w *jlexer.Lexer)
 }
 
+// MarshalerUnmarshaler is an easyjson-compatible marshaler/unmarshaler interface.
+type MarshalerUnmarshaler interface {
+	Marshaler
+	Unmarshaler
+}
+
 // Optional defines an undefined-test method for a type to integrate with 'omitempty' logic.
 type Optional interface {
 	IsDefined() bool
@@ -36,9 +43,17 @@ type UnknownsMarshaler interface {
 	MarshalUnknowns(w *jwriter.Writer, first bool)
 }
 
+func isNilInterface(i interface{}) bool {
+	return (*[2]uintptr)(unsafe.Pointer(&i))[1] == 0
+}
+
 // Marshal returns data as a single byte slice. Method is suboptimal as the data is likely to be copied
 // from a chain of smaller chunks.
 func Marshal(v Marshaler) ([]byte, error) {
+	if isNilInterface(v) {
+		return nullBytes, nil
+	}
+
 	w := jwriter.Writer{}
 	v.MarshalEasyJSON(&w)
 	return w.BuildBytes()
@@ -46,6 +61,10 @@ func Marshal(v Marshaler) ([]byte, error) {
 
 // MarshalToWriter marshals the data to an io.Writer.
 func MarshalToWriter(v Marshaler, w io.Writer) (written int, err error) {
+	if isNilInterface(v) {
+		return w.Write(nullBytes)
+	}
+
 	jw := jwriter.Writer{}
 	v.MarshalEasyJSON(&jw)
 	return jw.DumpTo(w)
@@ -56,6 +75,13 @@ func MarshalToWriter(v Marshaler, w io.Writer) (written int, err error) {
 // false if an error occurred before any http.ResponseWriter methods were actually
 // invoked (in this case a 500 reply is possible).
 func MarshalToHTTPResponseWriter(v Marshaler, w http.ResponseWriter) (started bool, written int, err error) {
+	if isNilInterface(v) {
+		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set("Content-Length", strconv.Itoa(len(nullBytes)))
+		written, err = w.Write(nullBytes)
+		return true, written, err
+	}
+
 	jw := jwriter.Writer{}
 	v.MarshalEasyJSON(&jw)
 	if jw.Error != nil {

vendor/github.com/mailru/easyjson/jlexer/lexer.go

@@ -5,6 +5,7 @@
 package jlexer
 
 import (
+	"bytes"
 	"encoding/base64"
 	"encoding/json"
 	"errors"
@@ -14,6 +15,8 @@ import (
 	"unicode"
 	"unicode/utf16"
 	"unicode/utf8"
+
+	"github.com/josharian/intern"
 )
 
 // tokenKind determines type of a token.
@@ -32,9 +35,10 @@ const (
 type token struct {
 	kind tokenKind // Type of a token.
 
-	boolValue  bool   // Value if a boolean literal token.
-	byteValue  []byte // Raw value of a token.
-	delimValue byte
+	boolValue       bool   // Value if a boolean literal token.
+	byteValueCloned bool   // true if byteValue was allocated and does not refer to original json body
+	byteValue       []byte // Raw value of a token.
+	delimValue      byte
 }
 
 // Lexer is a JSON lexer: it iterates over JSON tokens in a byte slice.
@@ -240,23 +244,65 @@ func (r *Lexer) fetchNumber() {
 
 // findStringLen tries to scan into the string literal for ending quote char to determine required size.
 // The size will be exact if no escapes are present and may be inexact if there are escaped chars.
-func findStringLen(data []byte) (isValid, hasEscapes bool, length int) {
-	delta := 0
-
-	for i := 0; i < len(data); i++ {
-		switch data[i] {
-		case '\\':
-			i++
-			delta++
-			if i < len(data) && data[i] == 'u' {
-				delta++
-			}
-		case '"':
-			return true, (delta > 0), (i - delta)
+func findStringLen(data []byte) (isValid bool, length int) {
+	for {
+		idx := bytes.IndexByte(data, '"')
+		if idx == -1 {
+			return false, len(data)
+		}
+		if idx == 0 || (idx > 0 && data[idx-1] != '\\') {
+			return true, length + idx
+		}
+
+		// count \\\\\\\ sequences. even number of slashes means quote is not really escaped
+		cnt := 1
+		for idx-cnt-1 >= 0 && data[idx-cnt-1] == '\\' {
+			cnt++
+		}
+		if cnt%2 == 0 {
+			return true, length + idx
+		}
+
+		length += idx + 1
+		data = data[idx+1:]
+	}
+}
+
+// unescapeStringToken performs unescaping of string token.
+// if no escaping is needed, original string is returned, otherwise - a new one allocated
+func (r *Lexer) unescapeStringToken() (err error) {
+	data := r.token.byteValue
+	var unescapedData []byte
+
+	for {