package main

import (
	"bytes"
	"fmt"
	"io"

	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/bson/bsonrw"
)

func main() {
	ej := []byte(`[{"x":1},{"y":2}]`)

	rw, err := bsonrw.NewExtJSONValueReader(bytes.NewReader(ej), true)
	if err != nil {
		panic(err)
	}

	dec, err := bson.NewDecoder(rw)
	if err != nil {
		panic(err)
	}

	for {
		var data interface{}
		err := dec.Decode(&data)
		if err == io.EOF {
			break
		}

		if err != nil {
			panic(err)
		}

		fmt.Println("data: ", data)
	}
}

❯ go run main.go
data:  [[{x 1}] [{y 2}]]
panic: runtime error: index out of range [-2]

goroutine 1 [running]:
go.mongodb.org/mongo-driver/bson/bsonrw.(*extJSONValueReader).Type(0x14000143b98?)
        /Users/preston.vasquez/Developer/mongo-go-driver/bson/bsonrw/extjson_reader.go:237 +0x48
go.mongodb.org/mongo-driver/bson/bsoncodec.EmptyInterfaceCodec.decodeType({0xa0?}, {0x1400013cc40, 0x0, {0x0, 0x0}, {0x0, 0x0}, 0x0, 0x0, 0x0, ...}, ...)
        /Users/preston.vasquez/Developer/mongo-go-driver/bson/bsoncodec/empty_interface_codec.go:116 +0x1cc
go.mongodb.org/mongo-driver/bson/bsoncodec.EmptyInterfaceCodec.DecodeValue({0x74?}, {0x1400013cc40, 0x0, {0x0, 0x0}, {0x0, 0x0}, 0x0, 0x0, 0x0, ...}, ...)
        /Users/preston.vasquez/Developer/mongo-go-driver/bson/bsoncodec/empty_interface_codec.go:152 +0x178
go.mongodb.org/mongo-driver/bson.(*Decoder).Decode(0x14000143f18, {0x1043d6260?, 0x1400010bad0})
        /Users/preston.vasquez/Developer/mongo-go-driver/bson/decoder.go:134 +0x3b4
main.main()
        /Users/preston.vasquez/Developer/technical/workshop/mongo/bson/more/main.go:27 +0x1b4
exit status 2

${DRIVERS_TOOLS}/.evergreen/start-orchestration.sh /Users/preston.vasquez/Developer/mongo-orchestration-home
curl -X POST http://localhost:8889/v1/replica_sets \	-H 'Content-Type: application/json' \	-d @${DRIVERS_TOOLS}/.evergreen/orchestration/configs/replica_sets/basic.json