[BUG]Dependencies injection failed

[rocinantex]

Dependencies injection failed

To Reproduce
The following code will be reproduce this bug

package main

import (
	"github.com/kataras/iris/v12"
	"github.com/kataras/iris/v12/mvc"
	"log"
)

type Service struct{}

func (s *Service) DoSomething(ctx iris.Context) {
	if _, err := ctx.WriteString("Foo bar"); err != nil {
		log.Println(err)
	}
}

type Controller struct {
	Ctx     iris.Context
	Service *Service
}

type FooController struct {
	Controller
}

type BarController struct {
	FooController
}

type FinalController struct {
	BarController
}

func (c *FinalController) Get() {
	// c.Ctx and c.Service are not injected
	// this action will trigger a panic
	c.Service.DoSomething(c.Ctx)
}

func main() {
	app := iris.New()
	m := mvc.New(app)
	m.Register(new(Service))
	m.Handle(new(FinalController))
	if err := app.Listen(":8080"); err != nil {
		log.Fatal(err)
	}
}

Desktop:

• OS: ubuntu 18.04

After debugging I found a possible cause of this bug
struct.go
reflect.go
In my gist case, the field.Index of all fields returned by LookupNonZeroFieldsValues will be come the last field.Index value

Then I try to fix this bug, I added the following code in
reflect.go

tmp := make([]int, len(index))
copy(tmp, index)
field := field{
    Type:   f.Type,
    Name:   f.Name,
    Index:  tmp,
    CanSet: isExported,
}		

Then the bug disappeared, but I still don't know why.
Because index is a local variable, why does it cause all fields to be modified?

[kataras]

Hello @rocinantex, the dependency injection code is fully re-written in the upcoming version of Iris, see the master branch. Try it, (see the new examples as well), and if your code still failing please post the code snippet in order to provide you more help, don't try to fix it alone, just share a re-producible code.

[rocinantex]

@kataras I just tried it with the same code in master branch and still injection failed.

I modified reflect.go, then it worked.

tmp := make([]int, len(index))
copy(tmp, index)
field.Index = tmp