I've already read the the other issues with keep_fnames, but in my case there is still a problem.

In my project I use uglify-js@2.7.5 and I want to keep the function names. So I set the keep_fnames parameter to true.

Now I want to use morris-data@0.5.1. As this module offers a minified JavaScript file, there functions within are named with single letters. So the output of uglify-js ends up with a file containing a line d(d,e). But the two d's should be different. This leads to an error.

For my project I worked arround with including the unminified morris file. But I don't think uglify-js should work like this.