"Cannot read property 'contents' of undefined" - after npm & imagemin update

[mobidev111]

npm version 2.1.7

package.json

    "devDependencies": {
        "gulp-imagemin": "^1.0.1",
        "imagemin-pngcrush": "^1.0.0",
        ...
    },

After a fresh npm install the following error appears. This as well happens with "gulp-imagemin": "^1.2.1".
The same code worked with an earlier npm version.

/Users/Test/testproject/node_modules/imagemin-pngcrush/index.js:18
        if (!isPng(file.contents)) {
                       ^
TypeError: Cannot read property 'contents' of undefined
    at /Users/Test/testproject/node_modules/imagemin-pngcrush/index.js:18:18
    at Imagemin.use (/Users/Test/testproject/node_modules/gulp-imagemin/node_modules/imagemin/index.js:64:51)
    at Array.forEach (native)
    at DestroyableTransform.through.obj.percent (/Users/Test/testproject/node_modules/gulp-imagemin/index.js:47:16)
    at DestroyableTransform._transform (/Users/Test/testproject/node_modules/gulp-imagemin/node_modules/through2-concurrent/through2-concurrent.js:29:15)
    at DestroyableTransform.Transform._read (/Users/Test/testproject/node_modules/gulp-imagemin/node_modules/through2-concurrent/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:184:10)
    at DestroyableTransform.Transform._write (/Users/Test/testproject/node_modules/gulp-imagemin/node_modules/through2-concurrent/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:172:12)
    at doWrite (/Users/Test/testproject/node_modules/gulp-imagemin/node_modules/through2-concurrent/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:237:10)
    at writeOrBuffer (/Users/Test/testproject/node_modules/gulp-imagemin/node_modules/through2-concurrent/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:227:5)
    at DestroyableTransform.Writable.write (/Users/Test/testproject/node_modules/gulp-imagemin/node_modules/through2-concurrent/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:194:11)

[kevva]

Seems like it's something wrong with your gulpfile. You're essentially piping "nothing" to gulp-imagemin and therefore it can't read the contents of your file. Can you paste it here or in a gist?

[kevva]

Well, going to close this since it's not an issue with imagemin but rather something in your gulp pipeline.

[drewnoakes]

I'm seeing this issue pop up on OSX for a gulpfile that works on Linux. There's no difference to the contents of the pipe in either case.

[drewnoakes]

See also gruntjs/grunt-contrib-imagemin#208.

[blindlybright]

I found a difference between previous gulp task on image optimization & example shown on https://www.npmjs.com/package/gulp-imagemin. Now it's useful to use imagemin-pngquant plugin instead of imagemin-pngcrush.

[raydelto]

update the package.json file and modify your grunt-contrib-imagemin to "grunt-contrib-imagemin": "^1.0.0",