npm del error in gulpfile Visual Studio 2015 - node.js

Question

I'm using the del package in my gulpfile as part of a clean task.
Below are the the versions of things I'm using
Visual Studio 2015 Community
Node.js v2.11.3
gulp v3.9.0
del v2.0.2
This is an extract from my gulp file:
var gulp = require('gulp');
var del = require('del');
var config = require('./gulp.config')();
var $ = require('gulp-load-plugins')({ lazy: true });
gulp.task('images', ['clean-images'], function () {
log('Copying and compressing the images');
return gulp
.src(config.images)
.pipe($.imagemin({optimizationLevel: 4}))
.pipe(gulp.dest(config.build + 'images'));
});
gulp.task('clean-images', function (done) {
clean(config.build + 'images/**/*.*', done);
});
function clean(path, done) {
log('Cleaning: ' + $.util.colors.blue(path));
del(path, done);
}
When I run the task images from the command prompt using gulp images the clean-images task executes but never finishes. It errors with the lines:
[16:10:45] Using gulpfile ~\Documents\Visual Studio 2015\Projects\**\Gulpfile.js
[16:10:46] Starting 'clean-images'...
[16:10:46] Cleaning: build/images/**/*.*
Process terminated with code 0.
As a result the rest of the images task doesn't execute.
The images task runs fine when I remove the clean-images dependency.
Don't suppose anyone has seen this issue before, and knows how to correct it?
Thanks

Answer 1

I think you've encountered the same error as this user : the del module doesn't use callbacks anymore, but promises. done is never called, so the clean and images task run concurrently, which causes an error.
You could just return from the clean method :
gulp.task('clean-images', function () {
return clean(config.build + 'images/**/*.*');
});
function clean(path) {
log('Cleaning: ' + $.util.colors.blue(path));
return del(path);
}