Why Does My Goroutine Output Disappear on Windows?

Goroutine Execution on Windows: Troubleshooting Silent Failure

A simple test involving goroutines shows unexpected behavior on Windows, as the expected output is not produced. The problem arises because the main function does not wait for the goroutine to complete before terminating.

Go Awaits

When a goroutine is launched using the "go" keyword, it executes concurrently with the main function. However, the main function's execution does not pause and wait for the completion of invoked goroutines. Consequently, the main function exits, potentially leaving the goroutine unscheduled.

Remedial Measures

To ensure that the goroutine has the opportunity to execute and print its output, the main function must be modified to wait for some time. This can be achieved using the "time" package and the "Sleep" function. By introducing a sleep time, the main function gives the goroutine a chance to run and produce output before terminating.

Modified Code

The following modified code resolves the issue by adding a 10-second sleep time to the end of the main function:

<code class="go">package main

import (
    "fmt"
    "time"
)

func test() {
    fmt.Println("test")
}

func main() {
    go test()
    time.Sleep(10 * time.Second)
}</code>

Output

The modified code now produces the expected output:

test

This modification allows the main function to wait after launching the goroutine, giving it enough time to execute and print the "test" message before the program terminates.

The above is the detailed content of Why Does My Goroutine Output Disappear on Windows?. For more information, please follow other related articles on the PHP Chinese website!