uglifyify is dropping a file

[tolmasky]

index.js:

require("babel-core/lib/generation")

browserify.js:

var gulp = require("gulp");

var browserify = require("browserify");
var source = require('vinyl-source-stream');
var gulp = require("gulp");


    var bundle = browserify({
        entries: ["./index.js"],
        debug: true,
        cache: {},
        packageCache: {},
        fullPaths: true
    })

   // If I comment out uglifyif then it works again.
    bundle = bundle.transform('uglifyify', { global: true });

    return bundle.bundle()
                 .pipe(source("main.bundle.js"))
                 .pipe(gulp.dest("./assets"));

Running node browserify.js breaks because node_modules/babel-core/node_modules/source-map/lib/base64-vlq.js disappears.

[tolmasky]

Heres the project if you're interested: http://tolmasky.com/letmeshowyou/uglifyify-bug.zip

[tolmasky]

Further inspection shows that it is mangle:true that is causing it (mangle:false leaves the file alone).

[tolmasky]

I figured this out. The file in question does this:

(function (require)
{
})(require)

Thus, the require is mangled in the function, and then not gotten. By blacklisting "Require" to never be mangled it solves this. However, given that this was something that took place in a dependency's dependency (and of a popular package), I think blacklisting "require" should maybe be the default behavior. OR, its possible that this is broken in that it should first grab dependencies then mangle.