What version of Go are you using (go version)?

$ go version
go version devel go1.18-b32209d22d Thu Sep 9 23:18:18 2021 +0000 windows/amd64

What did you do?

package main

import (
	"fmt"
)

type ISetName interface {
	SetName(name string)
}

type Item struct {
	Name string
}


func (i *Item) SetName(name string)  {
	i.Name = name
}

func Hello[T ISetName]()  {
	ins := new(T)
	(ins).SetName("foo")
        fmt.Printf("%+v", ins)
}

func main() {
	Hello[Item]()
}

What did you expect to see?

output: {Name:"foo"}

What did you see instead?

// go version devel go1.18-b32209d22d
output:Item does not satisfy ISetName: wrong method signature
	got  func (*Item).SetName(name string)
	want func (ISetName).SetName(name string)

// go2go playground
output:Item does not satisfy ISetName: wrong method signature
	got  func (*Item).SetName(name string)
	want func (ISetName).SetName(name string)

when method 'SetName' with value receiver is ok, but pointer receiver not

package main

import (
	"fmt"
)

type ISetName interface {
	SetName(name string)
}

type Item struct {
	Name string
}


func (i Item) SetName(name string)  {
	i.Name = name
}

func Hello[T ISetName]()  {
	ins := new(T)
	(ins).SetName("foo")
        fmt.Printf("%+v", ins)
}

func main() {
	Hello[Item]()
}

// go version devel go1.18-b32209d22d
output: error: cannot convert ins (variable of type *T) to ISetName

// go2go playground
output:&{Name:}

It is seem that go2go playroung can work with value receiver method 'SetName', but go version devel go1.18-b32209d22d not.

package main

import (
	"fmt"
)

type ISetName interface {
	SetName(name string)
}

type Item struct {
	Name string
}


func (i Item) SetName(name string)  {
	i.Name = name
}

func Hello[T ISetName]()  {
	ins := new(T)
	(*ins).SetName("foo")
        fmt.Printf("%+v", ins)
}

func main() {
	Hello[Item]()
}

// go version devel go1.18-b32209d22d
output: &{Name:}