Unhandled stream error in pipe

[ilovecoffee]

I am encountering following issue:

`
$ gulp build
[13:17:56] Using gulpfile ~/Projects/projectx/gulpfile.js
[13:17:56] Starting 'build'...
[13:17:56] Starting 'build-clean-dist'...
[13:17:56] Starting 'build-clean-temp'...
[13:17:56] Starting 'jshint'...
[13:17:56] Starting 'sass'...
[13:17:56] Finished 'build-clean-dist' after 32 ms
[13:17:56] Finished 'sass' after 451 ms
[13:17:56] Finished 'build-clean-temp' after 489 ms
[13:17:59] Finished 'jshint' after 3.58 s
[13:17:59] Starting 'build-copy'...
[13:18:00] Finished 'build-copy' after 368 ms
[13:18:00] Starting 'build-iife'...
[13:18:00] Finished 'build-iife' after 202 ms
[13:18:00] Starting 'build-usemin'...

stream.js:74
throw er; // Unhandled stream error in pipe.
^
Error
at new JS_Parse_Error (eval at (/Users/coffeebeans/Projects/projectx/node_modules/uglify-js/tools/node.js:22:1), :1526:18)
at js_error (eval at (/Users/coffeebeans/Projects/projectx/node_modules/uglify-js/tools/node.js:22:1), :1534:11)
at croak (eval at (/Users/coffeebeans/Projects/projectx/node_modules/uglify-js/tools/node.js:22:1), :2026:9)
at token_error (eval at (/Users/coffeebeans/Projects/projectx/node_modules/uglify-js/tools/node.js:22:1), :2034:9)
at unexpected (eval at (/Users/coffeebeans/Projects/projectx/node_modules/uglify-js/tools/node.js:22:1), :2040:9)
at expr_atom (eval at (/Users/coffeebeans/Projects/projectx/node_modules/uglify-js/tools/node.js:22:1), :2542:13)
at maybe_unary (eval at (/Users/coffeebeans/Projects/projectx/node_modules/uglify-js/tools/node.js:22:1), :2716:19)
at expr_ops (eval at (/Users/coffeebeans/Projects/projectx/node_modules/uglify-js/tools/node.js:22:1), :2751:24)
at maybe_conditional (eval at (/Users/coffeebeans/Projects/projectx/node_modules/uglify-js/tools/node.js:22:1), :2756:20)
at maybe_assign (eval at (/Users/coffeebeans/Projects/projectx/node_modules/uglify-js/tools/node.js:22:1), :2780:20)
`

Installed packages in the proect directory:
$ npm ls --depth=0 projectx ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] └── [email protected]

My package.json has:

$ cat package.json { "name": "projectx", "version": "2.0.0", "license": "UNLICENSED", "repository": { "type": "git", "url": "xxx" }, "devDependencies": { "browser-sync": "^2.11.1", "git-rev": "^0.2.1", "gulp": "^3.9.1", "gulp-autoprefixer": "^3.1.0", "gulp-clean": "^0.3.1", "gulp-iife": "^0.2.4", "gulp-jshint": "^2.0.0", "gulp-minify-css": "^1.2.4", "gulp-rev": "^7.0.0", "gulp-sass": "^2.2.0", "gulp-uglify": "^1.5.3", "gulp-usemin": "^0.3.21", "gulp-zip": "^3.2.0", "jshint": "^2.9.1", "jshint-stylish": "^2.1.0", "run-sequence": "^1.1.5", "vinyl-ftp": "^0.4.5" } }

Package installed globally
$ npm ls -g --depth=0 /usr/local/lib ├── [email protected] ├── [email protected] ├── [email protected] ├── [email protected] └── [email protected]

[ilovecoffee]

Argh not sure why formatting is messing up.

[ilovecoffee]

After digging for some time, I stumbled upon the code that is responsible for this error. If you have a this._super(...arguments); line in your function, usemin throws this error.