panic: runtime error Crash in Orphaned gorutines cant be handled

[vkstack]

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

$ go version
go1.16.5

Does this issue reproduce with the latest release?

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/vajahatk/Library/Caches/go-build"
GOENV="/Users/vajahatk/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/vajahatk/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/vajahatk/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GOVCS=""
GOVERSION="go1.16.5"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/vajahatk/work/dotpe/location/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/dv/g91vgh2x58b0b8pcxv8qr_yh0000gn/T/go-build4233566118=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

package main

import (
	"fmt"
	"log"
	"net/http"
)

func main() {
	startServer()
}

func startServer() {
	mainchan := make(chan struct{})
	go func(ch chan<- struct{}) {
		defer func() {
			if r := recover(); r != nil {
				fmt.Println("recovered from crash\n", r)
				ch <- struct{}{}
			}
		}()
		http.HandleFunc("/divide", func(w http.ResponseWriter, req *http.Request) {
			go panic("this is to be catched")
			fmt.Fprintf(w, "Hello, \nyour question is submitted\t")
		})
		log.Fatal(http.ListenAndServe(":8081", nil))
	}(mainchan)
	<-mainchan
	fmt.Println("safe landing")
}

What did you expect to see?

safe landing

What did you see instead?

panic: this is to be catched

goroutine 7 [running]:
panic(0x1242be0, 0xc000012060)
        /usr/local/go/src/runtime/panic.go:1065 +0x565
runtime.goexit()
        /usr/local/go/src/runtime/asm_amd64.s:1371 +0x1
created by main.startServer.func1.2
        /Users/vajahatk/work/test/main.go:29 +0x1e5
exit status 2

[seankhliao]

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