rails/rails — comment on commit 4f6af26a886630c97865a2e5023a9560692e6aa4
File:  line 0
By guilleiguaran:

```
irb(main):001:0> nil.id
NoMethodError: undefined method `id' for nil:NilClass
from (irb):1
from /Users/guille/.rbenv/versions/1.9.3-p0/bin/irb:12:in `

'
```