ckknight/gorillascript — pull request #146 by unc0 (2014-03-20 11:39:00+00:00)
Title: Add sourcemap generator into compile procedure.

Now you can have original source position in stack trace.

```gorillascript
let x()
throw new Error("hello")

x()
```

```log
Error: hello
at x (/home/unco/snips/gerror/error.gs:2:8, :4:11)
at Object. (/home/unco/snips/gerror/error.gs:4:1, :6:3)
at Object. (/home/unco/snips/gerror/error.gs :7:3)
at Module._compile (module.js:456:26)
at _step (/home/unco/repos/new/gorillascript/lib/gorilla.js:1690:31)
at Object._send [as send] (/home/unco/repos/new/gorillascript/lib/gorilla.js:1710:16)
at continuer (/home/unco/repos/new/gorillascript/lib/gorilla.js:189:31)
at callback (/home/unco/repos/new/gorillascript/lib/gorilla.js:200:14)
at Array.step [as 0] (/home/unco/repos/new/gorillascript/lib/gorilla.js:53:28)
at Object._onImmediate (/home/unco/repos/new/gorillascript/lib/gorilla.js:26:25)
```

BTW, the sourcemap generated by gorillascript is not correct in the first trace frame.