wrong argument type String (expected Array)

Question

I'm trying to use Octopress (a blogging engine on top of Jekyll) on my new Macbook, and I get this error when I run bundle exec jekyll --server:

(shortened path)

/path/to/markdown.rb:118:in `to_html': wrong argument type String (expected Array) (TypeError)
from /path/to/markdown.rb:118:in `convert'
...

(full path)

/usr/local/rvm/gems/ruby-1.9.2-p290/gems/jekyll-0.11.0/lib/jekyll/converters/markdown.rb:118:in `to_html': wrong argument type String (expected Array) (TypeError)
from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/jekyll-0.11.0/lib/jekyll/converters/markdown.rb:118:in `convert'
...

Looking at line 118, I see:

RDiscount.new(content, *@rdiscount_extensions).to_html

If I replace this line with a string like "hello", the server starts fine. But if I replace it with something like RDiscount.new("hello").to_html, I get the same error. However, launching irb and running RDiscount.new("hello").to_html works fine.

Any ideas what's wrong? I'm able to launch the server on another computer I have, but I'm not sure how to figure out what's the difference between what the two computers are doing (a different version of some library somewhere?).

Centum

Very odd. Perhaps try switching to kramdown instead of RDiscount? – Hazen

Answer 1

Just a thought, but have you tried updating your gemset? The most recent version of jekyll is 0.11.2 and it uses maruku by default instead of RDiscount.

https://github.com/mojombo/jekyll/wiki/Install

Bambibambie

Yep, I've tried updating my gems (IIRC, I manually switched to RDiscount instead of Maruku because of LaTeX support, following some jekyll<->LaTeX instructions I followed somewhere). – Centum

Answer 2

First thing i'd do is check all the versions. ruby -v , gem -v, gem list -d sinatra , gem list -d octopress. etc and look for differences.

Pestle

Answer 3

I was having this error too. I solved it by creating a new RVM gemset and rerunning bundle install.

See also https://github.com/rtomayko/rdiscount/issues/66

$ rvm gemset create gaga
'gaga' gemset created (/Users/chaffee/.rvm/gems/ruby-1.9.3-p125@gaga).
$ rvm use @gaga
Using /Users/chaffee/.rvm/gems/ruby-1.9.3-p125 with gemset gaga
$ bundle install
...
Installing rdiscount (1.6.8) with native extensions 
...
$ irb
>> require 'rdiscount'
=> true
>> RDiscount.new("hello").to_html
=> "<p>hello</p>\n"

Marley