Weird errorOnUnusedConfig behavior

[marcospgp]

Without errorOnUnusedConfig: false, I got the following error:

 Error in plugin "gulp-responsive"
Message:
    Available images do not match the following config:
  - `**/*`

With errorOnUnusedConfig: false, the error disappears, and ALL the images go through, except some get skipped because of enlargement.

My guess is that the skip on enlargement is triggering the unused config error by mistake.

Here's the task I'm using (with the errorOnUnusedConfig: false):

gulp.task('image:build', () => {
  return gulp.src(gulpPaths.src.img)
    .pipe(plumber())
    .pipe(changed(gulpPaths.build.img))
    .pipe(responsive({
      // Limit image size to 600px for both width an height
      // (example: 300x1200 image gets resized to 150x600)
      '**/*': {
        width: 600,
        height: 600,
        min: false,
        max: true, // Use width and height as max values, preserve aspect ratio
        quality: 80, // Only applies to JPEG, WebP and TIFF
        progressive: true,
        compressionLevel: 6,
        withMetadata: false,
        withoutEnlargement: true,
        skipOnEnlargement: false
      }
    }, {
      errorOnEnlargement: false,
      errorOnUnusedConfig: false
    }))
    .pipe(imagemin([
      imagemin.gifsicle({ interlaced: true }),
      imagemin.jpegtran({ progressive: true }),
      imagemin.optipng({ optimizationLevel: 6 }),
      imagemin.svgo({
        plugins: [
          { removeViewBox: false },
          { cleanupIDs: true }
        ]
      })
    ]))
    .pipe(gulp.dest(gulpPaths.build.img))
    .pipe(reload({ stream: true }));
});