SCSS Taks with error management

gulpfile.js

// Konfigurasi
var gulp  = require('gulp');
var sass = require('gulp-sass');
var browserSync = require('browser-sync').create();
var reload = browserSync.reload;
var plumber = require('gulp-plumber');
var notify = require('gulp-notify');

// Compile SCSS
gulp.task('sass', function () {
  return gulp.src('./app/scss/*.scss')
    .pipe(plumber()
    .pipe(sass())
    .pipe(plumber.stop())
    .pipe(gulp.dest('./app/css'))
    .pipe(reload({stream: true}));
});