stopProcess throws uncaught exception when process has already exited

[igorgudelj]

When stopAllProcesses() is called during before-quit, killSync() throws if a child process has already exited. This surfaces as an Electron "JavaScript error in the main process" dialog on Windows.

Uncaught Exception:
Error: Command failed: taskkill /pid 76672 /T /F
ERROR: The process "76672" not found.

    at killSync (node_modules/kill-sync/dist/cjs/kill.js:22:42)
    at stopProcess (electron-plugin/dist/server/api/childProcess.js)
    at stopAllProcesses (electron-plugin/dist/server/api/childProcess.js)

The function already guards against a missing alias (if (proc === undefined) return), but doesn't handle the case where the process object exists in state while the OS process has already terminated.

This can happen when:

• The PHP process crashes or exits on its own before app quit
• stopAllProcesses() is called more than once during shutdown (e.g. before-quit fires multiple times)
• autoUpdater.quitAndInstall() triggers a quit while a quit is already in progress

Steps to reproduce

1. Start a NativePHP app on Windows
2. Trigger a scenario where the PHP child process exits before stopAllProcesses() runs during before-quit
3. Close the app

Expected: App closes cleanly.
Actual: Error dialog: "A JavaScript error occurred in the main process"

Suggested fix

Wrap the kill calls in stopProcess with a try-catch — a dead process is the desired outcome, not an error.