title: Error: Missing positive glob
body: <p>The above message appears everytime the gulp gets to the 'markup' function.</p>
  
  <p>Here is my gulpfile:</p>
  
  <pre><code>var gulp = require('gulp'),
      autoPrefixer = require('gulp-autoprefixer'),
      jade = require('gulp-jade'),
      liveReload = require('gulp-livereload'),
      sourceMaps = require('gulp-sourcemaps'),
      ts = require('gulp-typescript'),
      tsLint = require('gulp-tslint'),
      watch = require('gulp-watch'),
      sass = require('gulp-sass');
  
  // Configuration
  var config = {
      js: 'public/_assets/frontend/js',
      css: 'public/_assets/frontend/css',
      fonts: 'public/_assets/frontend/fonts',
      images: 'public/_assets/frontend/img',
      markup: 'public/'
  };
  
  // Javascript
  gulp.task('scripts', function() {
      var tsResult = gulp.src(['src/ts/*.ts', 'src/ts/**/*.ts'])
          .pipe(tsLint())
          .pipe(ts({
              noImplicitAny: true
          }));
  
          tsResult.js
              .pipe(gulp.dest(config.js))
              .pipe(liveReload());
  });
  
  // Sass
  gulp.task('sass', function() {
      return gulp.src(['src/sass/*.scss', 'src/sass/**/*.scss'])
          .pipe(watch(['src/sass/*.scss', 'src/sass/**/*.scss']))
          .pipe(sourceMaps.init())
          .pipe(sass.sync().on('error', sass.logError))
          .pipe(autoPrefixer({
              browsers: ['last 3 versions'],
              cascade: false
          }))
          .pipe(sourceMaps.write())
          .pipe(gulp.dest(config.css))
          .pipe(liveReload());
  });
  
  // jade
  gulp.task('markup', function() {
      return gulp.src([['src/**/*.jade', 'src/**/_*.jade']])
          .pipe(jade({
              pretty: true
          }))
          .pipe(gulp.dest(config.markup))
          .pipe(liveReload());
  });
  
  // Images
  gulp.task('images', function() {
      return gulp.src(['src/images/**/*.*', 'src/images/*.*'])
          .pipe(gulp.dest(config.images));
  });
  
  // Watch
  gulp.task('watch', function() {
      liveReload.listen();
      gulp.watch(['src/ts/*.ts', 'src/ts/**/*.ts'], ['scripts']);
      gulp.watch(['src/sass/*.scss', 'src/sass/**/*.scss'], ['sass']);
      gulp.watch(['src/*.jade', 'src/**/*.jade'], ['markup']);
  });
  
  // Default Task
  gulp.task('default', function() {
      gulp.start('sass', 'scripts', 'markup', 'images', 'watch');
  });
  
  // Dist Scripts
  gulp.task('distScripts', function() {
      return gulp.src(['src/ts/plugins/**/*', 'src/ts/*.js'], { "base" : "./src/ts" })
          .pipe(gulp.dest(config.js));
  });
  
  // Dist Styles
  gulp.task('distStyles', function() {
      return gulp.src('src/sass/**/*.css', { "base" : "./src/sass" })
          .pipe(autoPrefixer({
              browsers: ['last 3 versions'],
              cascade: false
          }))
          .pipe(gulp.dest(config.css));
  });
  
  // Dist Fonts
  gulp.task('distFonts', function() {
      return gulp.src('src/fonts/**/*', { "base" : "./src/fonts" })
      .pipe(gulp.dest(config.fonts));
  });
  
  
  // Dist
  gulp.task('dist', function() {
      gulp.start('distScripts', 'distStyles', 'images', 'distFonts');
  });
  </code></pre>
  
  <p>Here is the message I get when I run 'gulp':</p>
  
  <pre><code>(node:9460) fs: re-evaluating native module sources is not supported. If you are using the graceful-fs module, please update it to a more recent version. [00:39:30] Using gulpfile D:\Projects\FrontEnd\Project\gulpfile.js [00:39:30] Starting 'default'... [00:39:30] Starting 'sass'... [00:39:30] Starting 'scripts'... [00:39:30] Finished 'scripts' after 4.66 ms [00:39:30] Starting 'markup'... [00:39:30] 'markup' errored after 86 μs [00:39:30] Error: Missing positive glob
      at Object.gs.create (D:\Projects\FrontEnd\Project\node_modules\gulp\node_modules\glob-stream\index.js:73:39)
      at Gulp.src (D:\Projects\FrontEnd\Project\node_modules\gulp\node_modules\vinyl-fs\lib\src\index.js:33:23)
      at Gulp.&lt;anonymous&gt; (D:\Projects\FrontEnd\Project\gulpfile.js:50:14)
      at module.exports (D:\Projects\FrontEnd\Project\node_modules\orchestrator\lib\runTask.js:34:7)
      at Gulp.Orchestrator._runTask (D:\Projects\FrontEnd\Project\node_modules\orchestrator\index.js:273:3)
      at Gulp.Orchestrator._runStep (D:\Projects\FrontEnd\Project\node_modules\orchestrator\index.js:214:10)
      at D:\Projects\FrontEnd\Project\node_modules\orchestrator\index.js:279:18
      at finish (D:\Projects\FrontEnd\Project\node_modules\orchestrator\lib\runTask.js:21:8)
      at module.exports (D:\Projects\FrontEnd\Project\node_modules\orchestrator\lib\runTask.js:60:3)
      at Gulp.Orchestrator._runTask (D:\Projects\FrontEnd\Project\node_modules\orchestrator\index.js:273:3) [00:39:30] Finished 'default' after 42 ms
  </code></pre>
  
  <p>Any idea why? Seems like it happens when rendering Jade... All the dependencies are installed of course.</p>