Accepting value with _ does not work，Just like this ： map["a"], _ = get()

[dairui520]

The following program sample.go triggers an unexpected result

const src1 = `
package main

import (
    "context"
	"fmt"
	"reflect"
	"errors"
)

func Process(ctx context.Context, input map[string]interface{}) ( map[string]interface{}, error) {

    attr := make(map[string]string)
    attr["pk_forum"] = input["pkForumStr"].(string)

    output := make(map[string]interface{})
    output["a"], _ = get()

    fmt.Println(output)
    return output, nil
}

func get() (string, error) {
     return "", errors.New("test error")
}
`

func main() {
	m := make(map[string]interface{})
	m["pkForumStr"] = ""
	i := interp.New(interp.Options{GoPath: build.Default.GOPATH})
	err := i.Use(stdlib.Symbols)
	if err != nil {
		fmt.Println(err)
	}
	_, err = i.Eval(src1)
	if err != nil {
		panic(err)
	}
	v, err := i.Eval("main.Process")
	if err != nil {
		panic(err)
	}
	bar := v.Interface().(func(context.Context, map[string]interface{}) (map[string]interface{}, error))
	r, err := bar(context.Background(), m)
	if err != nil {
		fmt.Println(err)
	}
	fmt.Println(r)
}

Expected result

map[a:getTest]

Got

map[]

Yaegi Version

v0.15.1

Additional Notes

I have tried several methods and found that when accepting values through map, it is ineffective. I think this is a bug and look forward to its fix.

Go 1.20