Defunct process playwright.sh

[j-fuentes]

I have discovered that playwright.Stop() lefts behind a defunct process.

It is possible to reproduce the problem doing this:

Create this simple Go program:

package main

import (
	"fmt"
	"time"

	"github.com/mxschmitt/playwright-go"
)

func main() {
    runOpts := &playwright.RunOptions{
		SkipInstallBrowsers: true,
	}
	
	pw, err := playwright.Run(runOpts)
	if err != nil {
		panic(err)
	}

	pw.Dispose()
	fmt.Println("after dispose")
	err = pw.Stop()
	fmt.Println("after stop: ", err)
	
	fmt.Println("after cleanup. Waiting...")
	time.Sleep(20*time.Second)
}

As you can see, I have made it wait 20secs at the end, enough to run check the mentioned defunct process.

I build the program with go build . and then I mount the binary in a docker container with the playwright runtime to test it:

$ docker run --name=bugdemo -ti -v $PWD/bugdemo:/mnt/bugdemo mcr.microsoft.com/playwright:focal bash

# /mnt/bugdemo
after dispose
after stop:  <nil>
after cleanup. Waiting...

I open another shell in the container and check the running processes:

$ docker exec -ti bugdemo bash

# ps aux
USER         PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root           1  0.0  0.0   4236  3368 pts/0    Ss   14:14   0:00 bash
root         106  0.1  0.0   4240  3416 pts/1    Ss   14:27   0:00 bash
root         114  0.0  0.0 1078984 6112 pts/0    Sl+  14:27   0:00 ./bugdemo
root         130  0.0  0.0      0     0 pts/0    Z+   14:27   0:00 [playwright.sh] <defunct>
root         133  4.0  0.3 568364 53268 pts/0    Sl+  14:27   0:00 /root/.cache/ms-playwright-go/1.10.0/node /root/.cache/ms-playwright-go/1.10.0/package/lib/cli/cli.js run-driver
root         140  0.0  0.0   5896  2932 pts/1    R+   14:27   0:00 ps aux

After 20secs, once the bugdemo process has finished, the defunct process disappears:

# ps aux
USER         PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root           1  0.0  0.0   4236  3368 pts/0    Ss+  14:14   0:00 bash
root         106  0.0  0.0   4240  3532 pts/1    Ss   14:27   0:00 bash
root         141  0.0  0.0   5896  2848 pts/1    R+   14:27   0:00 ps aux

I would expect pw.Stop() or pw.Dispose() to cleanup the playwright runtime completly.