fix windows cli output when exiting

fixes #17343

scripts/code-cli.bat

+@echo off
+setlocal
+
+title VSCode Dev
+
+pushd %~dp0\..
+
+:: Node modules
+if not exist node_modules call .\scripts\npm.bat install
+
+for /f "tokens=2 delims=:," %%a in ('findstr /R /C:"\"nameShort\":.*" product.json') do set NAMESHORT=%%~a
+set NAMESHORT=%NAMESHORT: "=%
+set NAMESHORT=%NAMESHORT:"=%.exe
+set CODE=".build\electron\%NAMESHORT%"
+
+for /f "tokens=2 delims=:," %%a in ('findstr /R /C:"\"electronVersion\":.*" package.json') do set DESIREDVERSION=%%~a
+set DESIREDVERSION=%DESIREDVERSION: "=%
+set DESIREDVERSION=v%DESIREDVERSION:"=%
+if exist .\.build\electron\version (set /p INSTALLEDVERSION=<.\.build\electron\version) else (set INSTALLEDVERSION="")
+
+:: Get electron
+if not exist %CODE% node .\node_modules\gulp\bin\gulp.js electron
+if not "%INSTALLEDVERSION%" == "%DESIREDVERSION%" node .\node_modules\gulp\bin\gulp.js electron
+
+:: Build
+if not exist out node .\node_modules\gulp\bin\gulp.js compile
+
+:: Configuration
+set ELECTRON_RUN_AS_NODE=1
+set NODE_ENV=development
+set VSCODE_DEV=1
+set ELECTRON_DEFAULT_ERROR_MODE=1
+set ELECTRON_ENABLE_LOGGING=1
+set ELECTRON_ENABLE_STACK_DUMPING=1
+
+:: Launch Code
+%CODE% --debug=5874 out\cli.js . %*
+popd
+
+endlocal

src/vs/code/node/cli.ts

@@ -73,9 +73,13 @@ export function main(argv: string[]): TPromise<void> {
 	return TPromise.as(null);
 }
 
+function eventuallyExit(code: number): void {
+	setTimeout(() => process.exit(code), 0);
+}
+
 main(process.argv)
-	.then(() => process.exit(0))
+	.then(() => eventuallyExit(0))
 	.then(null, err => {
 		console.error(err.stack ? err.stack : err);
-		process.exit(1);
+		eventuallyExit(1);
 	});