gulp.src as a writable passthrough

[corydorning]

I'm trying to pipe some files to a stream per the 3.80 release notes (https://github.com/gulpjs/gulp/blob/master/CHANGELOG.md#380), but i'm not having any luck. My task is as follows:

gullp.task('vendor-js', ['clean'], function() {
    return gulp
      .src(['js/vendor/libs/jquery.min.js', 'js/vendor/libs/jquery-ui.min.js', 'js/vendor/**/*.js'], { cwd: './src/' })

      // minify the js
      .pipe(uglify({ preserveComments: 'some'}))

      // concat all linted/minified js files into app.js
      .pipe(concat('vendor.js', { newLine: '\r\n\r\n' }))

      // add modernizr.js
      .pipe(gulp.src('js/modernizr.min.js'))

      // place vendor.js into /root/dist/js
      .pipe(gulp.dest('./dist/'js/'))
      ;
  });

Which produces this error:

stream.js:94
      throw er; // Unhandled stream error in pipe.
            ^
Error: write after end
    at writeAfterEnd (C:\web\www\gxl-bp\node_modules\gulp\node_modules\vinyl-fs\node_modules\through2\node_modules\readable-stream\lib\_stream_writable.js:145:12)
    at Transform.Writable.write (C:\web\www\gxl-bp\node_modules\gulp\node_modules\vinyl-fs\node_modules\through2\node_modules\readable-stream\lib\_stream_writable.js:193:5)
    at Stream.ondata (stream.js:51:26)
    at Stream.emit (events.js:95:17)
    at Stream.endStream (C:\web\www\gxl-bp\node_modules\gulp-concat\index.js:43:10)
    at _end (C:\web\www\gxl-bp\node_modules\gulp-concat\node_modules\through\index.js:65:9)
    at Stream.stream.end (C:\web\www\gxl-bp\node_modules\gulp-concat\node_modules\through\index.js:74:5)
    at Transform.onend (C:\web\www\gxl-bp\node_modules\gulp-uglify\node_modules\through2\node_modules\readable-stream\lib\_stream_readable.js:505:10)
    at Transform.g (events.js:180:16)
    at Transform.emit (events.js:117:20)

If i remove .pipe(gulp.src('js/modernizr.min.js')) all works as expected.

[corydorning]

Additonally I tried `.pipe(gulp.src('js/modernizr.min.js', { cwd: build.src }))`` with no luck

[yocontra]

duplicate of gulpjs/vinyl-fs#25