Unmarshal() fails with an error "duplicated struct field name"

[ikedas]

Version

v1.10.0

Description

When there is a field with a name that matches the custom key of a tag attached to another field in the structure, Unmarshal() fails with an error "duplicated struct field name".

構造体の別のフィールドに付けられたタグのカスタムキーと一致する名前のフィールドがある場合に「重複したフィールド名」としてUnmarshal()が失敗する。

How to reproduce

Test code

package main

import (
        "github.com/goccy/go-yaml"
        "log"
)

type Config struct {
        Domain string
        Host   string `yaml:"domain"`
}

func main() {
        config := Config{}
        buf := "---\ndomain:\n"
        if err := yaml.Unmarshal([]byte(buf), &config); err != nil {
                log.Fatal(err)
        }
}

Result

2023/03/06 17:23:25 duplicated struct field name domain:
    github.com/goccy/go-yaml.structFieldMap
        /home/user/go/pkg/mod/github.com/goccy/[email protected]/struct.go:124