Gin Can't read channel in goroutine in gin handler

Description

How to reproduce

package main

import (
    "fmt"
    "github.com/gin-gonic/gin"
)

var signal chan string

func Run() {
    router := gin.Default()

    router.GET("/open", func(context *gin.Context) {
        go func() {
            select {
            case s := <-signal:
                fmt.Println(s)
            }
        }()
    })

    router.GET("/close", func(context *gin.Context) {
        signal <- "close"
    })

    router.Run(":8001")
}

Expectations

curl http://localhost:8001/open
curl http://localhost:8001/close

// print close

Actual result

curl http://localhost:8001/open
curl http://localhost:8001/close 
// hung up

Environment

• go version: 1.19
• gin version (or commit ref): 1.7.1
• operating system: MacOS

Comment From: mstmdev

Please ensure already initialize the channel signal, for example signal = make(chan string).

Comment From: MikeJackOne

That's not the issue of gin, you don't even initialize the channel!