[jruby-user] JRuby 1.7.13: Why does [ "%0d" % nil ] not generate an error as it does under Ruby 1.9.3?

Hi all;

I've just bumped into a little anomoly between JRuby 1.7.13 and Ruby 1.9.3.

*Under Ruby 1.9.3:*
This statement generates an error:
3] pry(#<Package>)> *p "%0d" % nil*
TypeError: can't convert nil into Integer
from (pry):8:in `%'
[4] pry(#<Package>)>

*Under JRuby 1.7.13:*
The same statement does *not* generate an error:
[4] pry(#<Package>)> p "%0d" % nil.0.0.0:8080-1) [4] pry(#<Package>)> *p
"%0d" % nil*
12:07:07,902 INFO  [stdout] (http-/0.0.0.0:8080-1) "0"
12:07:07,903 INFO  [stdout] (http-/0.0.0.0:8080-1) => "0"


Can anyone account for the difference? Which is the "correct" response?

Thanks,
Tim