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Found error: TypeError: Object function () ... has no method 'on' #3

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BrainCrumbz opened this issue Oct 13, 2014 · 3 comments
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Found error: TypeError: Object function () ... has no method 'on' #3

BrainCrumbz opened this issue Oct 13, 2014 · 3 comments

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@BrainCrumbz
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I'm preparing a gulpfile using, among others, the gulp-6to5 plugin. It does not seem to be a transpiling issue (see babel/babel#58).

When running the following 'build' gulp task (sixToFive is 'gulp-6to5'):

var config = { production: true };

gulp.task('build', ['setup', 'clean', 'compile']);
// ...
gulp.task('compile', function () {
  var compress = lazypipe()
    .pipe(concat, 'all.js')
    .pipe(uglify);

  return gulp.src('src/lib/**/*.js')
    .pipe(sourcemaps.init())
    .pipe(sixToFive())
    .pipe(gulpif(config.production, compress))
    .pipe(sourcemaps.write('./'))
    .pipe(gulp.dest(paths.dist));
});

I got the following error:

[03:47:06] 'compile' errored after 13 ms
[03:47:06] TypeError: Object function () {
                                validateSteps(steps);
                                return combine.apply(null, steps.map(function(t) {
                                        return t.task.apply(null, t.args);
                                }));
                        } has no method 'on'
    at DestroyableTransform.Readable.pipe (..rootDir..\node_modules\gulp-6to5\node_modules\through2\node_modules\read
able-stream\lib\_stream_readable.js:516:8)
    at Gulp.gulp.task.mochaOptions.ui (..rootDir..\gulpfile.js:54:6)
    at module.exports (..rootDir..\node_modules\gulp\node_modules\orchestrator\lib\runTask.js:34:7)
    at Gulp.Orchestrator._runTask (..rootDir..\node_modules\gulp\node_modules\orchestrator\index.js:273:3)
    at Gulp.Orchestrator._runStep (..rootDir..\node_modules\gulp\node_modules\orchestrator\index.js:214:10)
    at ..rootDir..\node_modules\gulp\node_modules\orchestrator\index.js:279:18
    at finish (..rootDir..\node_modules\gulp\node_modules\orchestrator\lib\runTask.js:21:8)
    at cb (..rootDir..\node_modules\gulp\node_modules\orchestrator\lib\runTask.js:29:3)
    at Gulp.<anonymous> (..rootDir..\gulpfile.js:43:3)
    at module.exports (..rootDir..\node_modules\gulp\node_modules\orchestrator\lib\runTask.js:34:7)

(I replaced with ..rootDir.. here, just not to show long paths in the post)

When config.production evaluates to false, no error shows up.
@sindresorhus
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Does it fail without the gulpif call? If no, then the problem is definitely not with this plugin.

return gulp.src('src/lib/**/*.js')
    .pipe(sourcemaps.init())
    .pipe(sixToFive())
    .pipe(sourcemaps.write('./'))
    .pipe(gulp.dest(paths.dist));

@BrainCrumbz
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If the gulpif call is there, and if its condition evaluates to false, everything goes fine. If condition evaluates to true, then the error shows up. Does this give you enough details to figure out whether it's a matter of this plugin or not?

@sindresorhus
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Yeah, not this plugin.

@BrainCrumbz BrainCrumbz mentioned this issue Oct 13, 2014
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@sindresorhus @BrainCrumbz