WebStorm: Unable to debug Node JS code using sourcemaps without transpiling/minification/etc.

I am attempting to debug a JS file that was copied from its original location. I want to be able to set breakpoints in the original file rather than the copied file. As far as I can tell the source map looks correct, but the debugger doesn't stop on my breakpoint.

No transpiling/minification/etc. in the copy process, it is just a simple copy. I haven't found exact documentation that this should work, but rather comments saying that it should. Can I map copied JS and debug in WebStorm using the original file - is this supported?

I'm attaching a minimized example to demonstrate. Execute following to setup:

• cd /path/to/sourcemaps1
• npm  install
• gulp build

https://drive.google.com/file/d/0B_ElxBdb19-XY3ZleW80RFRkTnM/view?usp=sharing 

My run configuration looks like this:

• Interpreter: /usr/local/bin/node
• Working Directory: /path/to/sourcemaps1
• JavaScript File: /bin/server/example.js

UPDATE 1: The problem seems to be with the sourcemap as there are no mappings. Adding the gulp-uglify module, then modifying the gulp file to include the following seems to correct the map:

 .pipe(sourceMaps.init())
 .pipe(uglify())
 .pipe(sourceMaps.write('.', { includeContent: false, sourceRoot: '../../server' }))

After rebuilding the debugger does break. But, if I duplicate the console.log() statement say x10 times, rebuild, and set multiple breakpoints - step-over and other debugger functions do not work. It appears only the first breakpoint is caught.