// SPOT THE LEAK. Run it — it prints goroutine counts. Explain why the number
// grows, then fix it with a one-character-ish change.
package main

import (
	"errors"
	"fmt"
	"runtime"
	"time"
)

func fetch() (string, error) {
	ch := make(chan string)
	go func() {
		time.Sleep(50 * time.Millisecond) // pretend slow upstream
		ch <- "body"
	}()
	select {
	case body := <-ch:
		return body, nil
	case <-time.After(10 * time.Millisecond): // timeout fires first
		return "", errors.New("timeout")
	}
}

func main() {
	for i := 0; i < 100; i++ {
		fetch()
	}
	time.Sleep(200 * time.Millisecond)
	fmt.Println("goroutines still alive:", runtime.NumGoroutine()) // expected: 1
}