嵌套的指针复制，貌似是存在问题的

[mfcheer]

Reproducible Example

import (
	"fmt"
	"github.com/jinzhu/copier"
)

type CStruct struct {
	d int64
}

type DStruct struct {
	d int64
}

type A struct {
	a int64
	d *CStruct
}

type B struct {
	a int64
	d *DStruct
}

func main() {
	m1 := make(map[int64]*A)
	m2 := make(map[int64]*B)

	m1[1] = &A{
		a: 1,
		d: &CStruct{
			d: 2,
		},
	}

	copier.Copy(&m2, m1)
	fmt.Println(*m1[1])
	fmt.Println(*m2[1])
}
{1 0xc000022078}
{0 <nil>}

Description