Node v4.2.1 throws error when using gulp-header

buffer.js:167
  throw new TypeError('must start with number, buffer, array or string');
  ^

TypeError: must start with number, buffer, array or string
    at fromObject (buffer.js:167:9)
    at new Buffer (buffer.js:58:10)
    at Concat.add (/.../node_modules/gulp-header/node_modules/concat-with-sourcemaps/index.js:40:15)
    at DestroyableTransform.TransformStream [as _transform] (/.../node_modules/gulp-header/index.js:49:12)
    at DestroyableTransform.Transform._read (/.../node_modules/gulp-header/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:172:10)
    at DestroyableTransform.Transform._write (/.../node_modules/gulp-header/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:160:12)
    at doWrite (/.../node_modules/gulp-header/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:326:12)
    at writeOrBuffer (/.../node_modules/gulp-header/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:312:5)
    at DestroyableTransform.Writable.write (/.../node_modules/gulp-header/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:239:11)
    at write (/.../node_modules/vinyl-source-stream/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:623:24)

How I’m using it (shortened for readability):

  // Create banner for Main JS file
  var javascriptBanner = ['/**',
    ' * This is the main js file',
    ' * Edited: <%= new Date() %>',
    ' */',
    '',
    'console.log("Time since you changed main.js: " + ((new Date().getTime() - <%= new Date().getTime() %> ) / 1000) + "s");',
    '',
    ''].join('\n');

module.exports = function(gulp, plugins, config, browserSync) {
  return function() {
        browserify({
            entries: [
                // ...
            ]
        })
        .transform()
        .transform()
        .bundle()
        .pipe(source(config.jsOutputFilename))
        .pipe(plugins.header(javascriptBanner))
        .pipe(gulp.dest(config.outputJsDir))
        .pipe(browserSync.stream())
 };
};

Commenting out the plugins.header line and the build works again.

Any ideas?

[enykeev]

As an additional clue, in my particular case I was able to work around the problem by using vinyl-buffer before and not after gulp-header:

// ...
  , browserify = require('browserify')
  , source = require('vinyl-source-stream')
  , buffer = require('vinyl-buffer')
  , sourcemaps = require('gulp-sourcemaps')
  , watchify = require('watchify')
  , header = require('gulp-header')
// ...

function Browserify() {
  var b = browserify(opts);

  if (watch) {
    b = watchify(b)
      .on('update', function () {
        bundle(b);
      });
  }

  b
    .transform(babelify.configure({
      // Make sure to change in test_compiler.js too
      optional: ['es7.classProperties']
    }))
    .on('log', gutil.log)
    ;

  return bundle(b);
}

function bundle(b) {
  return b.bundle()
    .on('error', function (error) {
      gutil.log(
        gutil.colors.cyan('Browserify') + gutil.colors.red(' found unhandled error:\n'),
        error.toString()
      );
      this.emit('end');
    })
    .pipe(source('main.js'))
    .pipe(buffer()) // <--
    .pipe(header('/* ' + buildHeader() + ' */'))
    .pipe(sourcemaps.init({ loadMaps: true }))
    .pipe(sourcemaps.write('./'))
    .pipe(gulp.dest('dist/js'))
    .pipe(size({
      showFiles: true
    }))
    .pipe(size({
      showFiles: true,
      gzip: true
    }));
}

[tracker1]

published patch