#raw_path does not generate the proper dependency

[denisdefreyne]

(Summarise the bug in a single line.)

Steps to reproduce

1. Create a site

2. echo stuff > content/z.dat

3. echo lol > content/a.dat

4. Add this to content/index.html:

   <%= @items.find_all('/**/*.dat').map { |i| File.size(i.reps[:default].raw_path) }.join('-') %>
   

5. Delete stylesheets and layouts

6. Replace rules with

   compile '/**/*.html' do
     filter :erb
     write item.identifier
   end
   
   passthrough '/*.dat'
   

7. Compile site

Expected behavior

output/index.html gets the content 3-6.

Actual behavior

Crash:

Captain! We’ve been hit!

Message:

Errno::ENOENT: No such file or directory @ rb_file_s_size - output/z.dat