I understand this has probably been like this for a while but I've never created a method named inspect on an object. Just spent over two hours trying to debug this.

At the very least this should be very well documented. Right now the first link in Google for node inspect reserved is a stackoverflow answer and there is no mention of this behavior in the documentation.

Obviously running this code in Chrome, Firefox, Safari, etc works as expected.

> process.versions
{ http_parser: '2.5.0',
  node: '2.0.2',
  v8: '4.2.77.20',
  uv: '1.5.0',
  zlib: '1.2.8',
  ares: '1.10.1-DEV',
  modules: '44',
  openssl: '1.0.2a' }
> function Test(){ };
undefined
> Test.prototype.inspect = function(){ return 'hahaha';}
[Function]
> var t = new Test()
undefined
> t
hahaha